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ankle sprain

AUTHOR: Marc Mitnick DPM

REVIEWED BY: Podiatric Medical Review Board

--> ankle sprain


An acute ankle sprain is one of the most common injuries to present to an Emergency Room. Although an injury of this nature may occur on either the inside or outside of the ankle, the lateral ankle sprain (outside) is far more common. This type of injury can be a very troubling problem and if not properly treated may result in chronic pain.

This article will discuss treatment for simple sprains as well as more complex ankle injuries. Some of you who will be reading this are apparently having issues with this type of injury that has not gotten better. Hopefully you will learn the process that is involved in the treatment of more severe sprains to the ankle.

The vast majority of people who sustain this type of injury do not seek medical attention and those that do, in many instances are under treated. Once a patient is seen in the Emergency Room they are generally discharged and told to see a podiatrist or orthopedist for follow-up care; many people do not bother. If there is not proper follow-up this increases the chances of problems going forward. If initial treatment is not aggressive enough this can lead to an instability in the ankle joint and in some cases may require surgical intervention down the road.

The ankle joint is known as a hinged synovial joint meaning the motion of the ankle is limited to an up-down motion also known as dorsiflexion and plantarflexion. Any movement of the foot to the inside (inversion) or the outside (eversion) comes primarily from the subtalar joint which is just below the ankle joint.

The most common form of injury is known as a lateral ankle sprain or inversion sprain. This is where the foot bends inward below the ankle joint. This causes a severe stretching on the outside of the ankle and conversely a jamming effect on the inside of the ankle. An ankle sprain is considered by many doctors to be a partial dislocation of the ankle joint.


Ankle sprains are "graded" according to severity.

  • Grade 1 is a minor strain with no tearing of ligaments.
  • Grade 2 is a partial tear of the lateral ankle ligaments.
  • Grade 3 is a full tear of one of the ligaments and possibly even a tear of what is known as the peroneal muscles that run directly underneath the outside of the ankle. Interestingly enough, sometimes a total tear of the lateral ankle ligaments can be less painful than a partial tear and this keeps the patient from seeking medical attention.
lateral ankle ligaments

There are three ligaments that make up the lateral ankle ligaments. (ATFL) Anterior talo-fibular ligament. (CFL) Calcaneal fibular ligament. (PTFL) Posterior talo-fibular ligament. A partial tear of two of the ligaments may end up more problematic than just a complete tear of one ligament.

Most, if not all lateral ankle sprains initially may not be too painful, but as the day progresses, so does the pain and swelling. In addition to pain and swelling there may be eccymosis (black and blue) in the surrounding area. This just represents broken blood vessels and is not an indicator of the severity of the injury. When we as foot specialists examine someone who has sustained an inversion sprain, we examine both the outside and inside of the ankle, the alignment of the foot relative to the ankle, as well as the tendons that surround the ankle.

A fairly common occurrence with severe inversion ankle sprains is possible fracture of the fifth metatarsal base. During the injury, when the foot bends inward, it puts a lot of pressure on the outside of the foot and in many instances can actually fracture part of the fifth metatarsal bone. Many non-footspecialists will not look for this potential problem and a fracture of the fifth metatarsal bone may go undiagnosed.

Additionally, the motion available in the ankle has to be tested as well as the fibula bone along its course. The fibula bone is the long bone on the outside of the leg that forms the outside of the ankle joint. The longer the patient has waited to seek medical attention, the more painful and swollen the ankle will be, making it more difficult for the doctor to adequately examine all parts of the foot, ankle and lower leg that may be involved.


Once presenting to the doctor or an Emergency Room, x-rays will be taken. X-rays cannot visualize ligaments or tendons for possible damage, but they are taken to rule out fracture, either to the ankle itself, the fifth metatarsal bone or to the lower leg. It is important to note, that very small "cracks" in bone may not show up initially on x-ray, but if the patient does not respond in the appropriate period of time for an ankle sprain, additional x-rays or even an MRI may have to be considered to look for small fractures. X-rays on the initial exam are also helpful in recognizing abnormal joint alignment as a result of the sustained trauma. If there is a mal-alignment of the ankle joint with no fracture, casting may be required to re-align the ankle joint, otherwise, the patient may have chronic pain in the ankle. Sometimes surgery is also necessary if the ankle cannot be re-aligned through manual means.

normal ankle mortise xray
abnormal ankle mortise xray

The last thing we are looking for with radiographs is an osteochondral defect. What happens here is a piece of bone is chipped off the talus bone, which is the bone in the foot that is basically the bottom portion of the ankle joint. If one is found, in most cases it must be removed surgically. If left alone it can act as an irritant in the joint and thus a source of ongoing pain.

In the majority of cases initial x-rays will be negative for any bone pathology. Due to the expense involved, an MRI is usually not performed on initial treatment (unless a fracture is suspected and not seen on x-ray). Some institutions may consider doing a diagnostic ultrasound to check the integrity of the ligaments and tendons surrounding the ankle. This is an inexpensive and quick test.


The treatment protocol for ankle sprains has changed dramatically over the last decade. Years ago the treatment of choice was rigid immobilization. This meant putting on a cast with the foot in proper alignment to the leg in order to allow the ankle to heal over time. Experience has shown that over immobilization, particularly in Grade 1 and Grade 2 sprains may lead to scar formation in the healing ligaments and tendons and can leave the patient with chronic pain. The only time a cast becomes mandatory is if there is an associated fracture with the ligament damage, or quite simply, the patient cannot bear weight on the foot. The use of crutches and remaining non-weightbearing on the foot would also be introduced at this time.

The alternative to a rigid cast would then be a soft supportive cast to help keep the swelling down, which will reduce pain, and to bear weight as tolerated. Within a few days, the soft cast may be replaced with an Aircast or other more mobile type brace which will allow the patient to start range of motion exercises in the ankle joint (as tolerated) in an effort to reduce scarring and maintaining motion in the ankle joint.

physical therapy for ankle sprains

In Grade 2 and Grade 3 sprains after about one week, the patient may want to start on a regimen of physical therapy. The purpose of which is to help facilitate the healing process, reduce edema, pain and increase motion in the joint, thus getting the patient healed quicker.

Grade 1 ankle sprains are treated a little bit different. Most of you are familiar with R.I.C.E. (Rest, Ice, Compression, Elevation). This along with anti-inflammatory medication (assuming you can tolerate them) is all that is necessary. Within a few days the ankle should feel better and each day should bring further improvement.

In an otherwise healthy individual Grade 1 ankle sprains take about one month to resolve themselves. A Grade 2 sprain in most cases will take upwards of two months and sometimes slightly longer while a Grade 3 sprain may take upwards of six months to fully resolve. This is not to say that you will not be walking, but more than likely you will need to ambulate with some form of ankle support, women in particular, will not be able to wear certain types of shoes and both men and women will have to refrain from certain athletic activities.


There is the ongoing debate of whether ice or heat is better for injuries such as a sprained ankle. Various doctors have different opinions. My feeling is that ice is necessary for the first 24 hours, simply to reduce swelling which will reduce pain. Cold clamps down blood vessels and reduces the amount of blood flow to an area and in this instance will then reduce swelling. The problem is that blood flow to an area is the way the body heals all types of injuries. It does so by bringing nutrients to the traumatized area. After 24 hours, when the swelling (and pain) have stabilized, it is time to discontinue ice and switch over to heat. Generally moist heat works better than heat from a device like a heating pad. By applying heat to the area, the blood vessels in the area dilate (open up) and more blood is able to flow into the area and begin the healing process.


In general, if you reach a point where you are not seeing further improvement each week and you are still having difficulty walking then it is time for further investigation. The guidelines given above are not carved in stone. If progress is not being made each and every week, particularly if you are having physical therapy, then a re-evaluation is necessary.

At this point an MRI would be indicated as this test will show damage to soft tissue meaning ligament, tendon and muscle. An MRI may also show a fracture that was not visible on x-ray. An osteochondral lesion (defect in bone from trauma) may also be visible. It is important to correlate any abnormal findings to the area where the patient is experiencing pain, as an MRI may show old injuries which are not part of the present problem.


In cases where the ATFL (anterior talo-fibular ligament) and the CFL (calcaneal fibular ligament) are both torn, this may require surgical intervention to repair the ligaments as a tear in two ligaments may be creating an instability in the ankle joint and thus continued pain. (See diagram) The third lateral ankle ligament is the PTFL (posterior talo-fibular ligament). A tear of just the ATFL generally does not have to be repaired as one tear in most cases will not cause ankle instability. The most common procedure done for lateral ankle tears is the Brostrom procedure which is a primary repair of the torn ligaments using suture anchored into the fibula bone. This will be followed by casting for as long as six weeks, but some authorities are now suggesting casting for as little as three weeks and then physical therapy, again, in an effort to create better motion in the joint. It should be pointed out, that by nature of the procedure, there will be some limitation of motion following this procedure. This occurs because the post-surgical ligaments are tighter than the pre-trauma ligaments.

Other surgical procedures done may require repair of the peroneal tendon on the outside of the ankle and if it determined that there indeed is an osteochondral defect, then that piece of bone may have to removed as well, usually via ankle arthroscopy.


Eversion ankle sprains as the name implies, are sprains on the inside of the ankle. This is a far less frequent injury then lateral ankle sprains because the mechanism of injury is far less common. This type of injury will occur primarily in athletes because they find themselves in awkward foot positions when doing their sport, along with being off balance many times. This type of injury is usually due to an eversion type of injury where the foot bends outward from the ankle (the exact opposite of an inversion sprain). Examples that might cause eversion sprains include a gymnast who continually misses a "landing" and the foot bends outward, or perhaps a soccer player who is running up and down a field that is all "beat up" causing the foot to over stretch and rotate outwards.

In addition to eversion injuries being less common than inversion injuries the ligament on the inside of ankle, known as the deltoid ligament is a much stronger ligament than the lateral ankle ligaments. Actually, there is a superficial and deep deltoid ligament and therefore is stronger than any of the lateral ankle ligaments singularly.

deltoid ligament
Injuries to this ligament are more the result of external rotation of the foot relative to the ankle (the foot twists outward, while the leg remains stationary). This can occur as previously stated when the foot does evert (bends outward).

When making a diagnosis of medial ankle sprain the mechanism of injury is important to know. This will alert your doctor to look at the inside of the ankle, as well as the outside. Unfortunately in most sporting events the injury is a result of a collision and all the athlete remembers is ending up on the ground.

The treatment for a medial ankle sprain is basically the same as already discussed for lateral ankle sprains. Initially x-rays will be taken to rule out fracture and to view the ankle morTise (the alignment of the ankle itself). Examination of the posterior tibial tendon is necessary as they pass just inferior to the inside of the ankle joint. These tendons have a greater propensity to "stretch" than to tear. Immobilization with an early return to weight bearing as tolerated by the patient is the standard course of therapy and once again should the patient not heal in an acceptable period of time further studies such as an MRI may be needed.

One difference in medial ankle sprains versus lateral ankle sprains is the use of orthotics. Orthotics nave the tendency to invert the foot and in doing so will reduce the strain on the deltoid ligament. This should make walking more comfortable and the healing process quicker. On the outside of the ankle an orthotic will cause a stretching of the soft tissue structures and this of course can exacerbate the problem of lateral ankle sprains.


The question always asked by athletes is when can they return to their activity. This is not an easy question to answer. Due to the complexity of ankle sprains as previously described, there is no cookie-cutter rule. The biggest concern is returning to athletic activity too soon and re-injuring the ankle, possibly worse than the original injury. Depending on age, weight and overall health, many people will experience chronic tenderness in an ankle that is clinically healed, particularly those individuals who have sustained repeated ankle sprains.

In my practice, when I feel a patient is clinically healed I first have them put the ankle to the "test" to make sure it will hold up to the rigors of their sport. I have them do some light running and other mobility exercises. Their response will allow me to give them advice going forward. Some will return to their normal activities in no time, while others will be forced to reduce their athletic activity and even have to use some sort of mobility brace just to stabilize the ankle with the expectation that over time the ankle will further improve.


Mayo Clinic

Harvard Health

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(location unknown)
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First, thanks for putting together this website. Its the most informative site I have found dealing with foot problems. Last June I started having pain and swelling at …….


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Madison, Alabama
Thanks for replying so quickly. I was a bit concerned. I think your website is great, and chock full of info.....


Denison, TX
Dr. Marc, Thank you so much for your reply which seemed to be right on. I have researched many sites but you put me on the right path to the possible answer. My foot pain may not rule the rest of my life after all! I believe I'll make a sign that reads, "THE END IS NEAR!" Thanks Very Much,


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New Zealand

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I searched the internet everywhere for a clear description and illustration of my symptoms/problem. was where I ended my search with answers. If I lived in Jersey (left 30 years ago) and didn't live in Florida I would definetly make an appointment with Dr. Mitnick.

Thanks, Kathy

1st of all THANKS A LOT for your great site......


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South Carolina
Hello! I want to thank you for such an informative website! I found you based on my ankle pain search and am happy to realize that there may be a relatively simple cause and solution....


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...Thanks for your fantastic service.


Arlington, VA

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Kelly W.

San Clemente, CA

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location unknown

Dr. Mitnick, Thank you so much for your reply. I did let my physician know and they took an x-ray - all is well! Also, thank you for providing this wonderful site, it is very helpful with lots of useful information! I appreciate your gift of time! God bless.


Dr. Mitnick, Thank you, you were 100% correct. The pain finally brought me to the ER. I spent 8 days in the hospital. The Doppler you spoke of was able to show that there was no pulse in that foot. This was an arterial clot that split and traveled throughout my leg. My leg was almost amputated. I am in rough shape but have all my parts intact!! You certainly know what you are talking about. Thank you for taking the time to answer. Yours Truly!


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Seattle, WA

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Also, and importantly, just want to praise this web site. Thorough and thoughtfully presented, it certainly must be of considerable assistance to anyone with a foot problem. Terrific -- and very interesting.I trust the address comes up easily for those seeking information.


New Jersey

Thanks so much for answering my question. You've been more help to me than my own Dr. has been lately. Thanks again....I hope to be able to walk without pain someday.


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Thanks so much for this website Dr. Marc! It is so nice that you have this ask the doctor feature..I'm sure I'ts been helpful for alot of people. I will try what you suggested and see if it helps...thanks again!


Evansville, IA

Dear Marc

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Russ W.

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Your website is full of a lot of helpful information, and I am very impressed with the time in which you responded to my post. Thank you again for your time and consideration in your response.


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San Diego, CA

Dr. Mitnick, Just want to say thank you so very much for your quick response and very informative reply! After reading what you had to say, I called the doctor's office and was able to get in and see him the same day as my injury. Toe was x-rayed and luckily, it is not broken or fractured. Very badly bruised and will probably lose the toe nail. And although my toe and toe nail are still very black and blue and very sore, they ARE both starting to feel a little better. So again, thank you! I am so very happy that I came across your website. The service you provide is outstanding and immeasurable!


Albany, NY

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Jill S.

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Whichita, KS

thanks again, this site is very helpful.


Boston, MA

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....Keep up what your doing. Your a life saver.



Thanks again for the information provided on your site. It's easy for non-medical folk to understand your writing, and helps provide better communication between patient and doctor.



Wonderful advice

by: Anonymous

This is the best site for foot problem info.

Thank you for this information. This description fits my pain and inflammation behind my 2nd toe perfectly.

by: Max

location unknown
Again, I really appreciate that you responded to my inquiry, and that your mention of Parkinson's helped me to find my way to a diagnosis of this difficult to diagnose disease. Most patients see on average 16 doctors before they are diagnosed. I hope that you can help other people that ask for your expertise in the future.

Barb D.

I just wanted to say that I am very greatful for this website!! I have had a fusion in my rt foot and am finally getting a little bit better......


location unknown
Again, Thank you from the bottom of my heart for taking the time to answer my question....your an angel!


Thank you for your response. You have provided some great insight (to my question)....


location unknown
Thank-you so very much for responding so quickly and in such detail to my question!! I will give my surgeon a call today!! This website is terrific!!!! Thank-you again!


North Carolina
Many Thanks Dr Marc!
Thank you for your response. It sounds like a good plan to me. He did not cut the wart out first ...


location unknown

Thanks again doc for having this website and we STILL need qualified Podiatrists in beautiful sunny Tampa Bay (Bradenton) Florida.

Bessie Mae

Dear Dr. Mitnick, Thank you so very much for taking your time to answer my question. You have greatly relieved my anxiety related to the continual tingly I feel in my feet. I will share your response with my podiatrist next week. God bless you for having this question and answer page on your website! Most gratefully,

Lynne T.

location unknown
Your webpage is excellent, I commend you on sharing your knowledge to the public.


New Jersey

Thank you. you were more detailed than what others have told me they finally called from the last xrays and my son is now in a cast for 2 weeks he did have a fracture that was not noticeable.

a mom

location unknown

I have read your website and I have to admit that I am amazed at all the information that is on here. I have learned more than the three years I have been going to several doctors that I have seen!!


Lenoir, NC

Thank you so much Doc for a quick and thorough response!


Bellevue, WA

I cannot thank you enough for your response, opinion, and suggestions! I want you to know how much it means to me, and I'm sure everyone else who has ever asked you a question! I feel like you're a lifesaver and have empowered me to take a stronger role and stand up for myself and my feet!


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