An eversion ankle sprain is a tear of the ligaments on the inside of the ankle. It is not as common as an inversion ankle sprain and is often accompanied by a fracture of the fibula bone.
Eversion ankle sprain symptoms
- You will usually know you have sprained their ankle. With an eversion ankle sprain, your ankle will roll inwards.
- There will be immediate pain on the inside of your ankle after twisting it.
- Swelling will develop rapidly and bruising may appear later.
- In moderate to severe eversion ankle sprains it is always recommended that an x-ray is requested to rule out fractures.
- You will likely have difficulty weight bearing and limited ankle mobility.
Eversion ankle sprain causes & anatomy
The ankle joint is held together by supporting ligaments which join bone to bone. The lateral ligaments are on the outside of the ankle and include the talofibular ligament (joins the talus to the fibula) and the calcaneofibula ligament (joins the calcaneus to the fibula).
The medial ligaments are on the inside of the ankle. They consist of the tibiotalar ligament (joins tibia to talus bone), the tibiocalcaneal ligament and the tibionavicular ligament which altogether are known as the deltoid ligament.
What is an ankle eversion sprain?
An eversion sprain is a tear of the deltoid ligaments, on the inside of the ankle. It is often called a medial ankle sprain or a deltoid ligament sprain. These ligaments provide support to prevent the ankle from turning inwards or everting.
An eversion ankle sprain is often associated with a fracture of the fibula bone, called a Pott’s fracture
It is rare for the deltoid ligaments to be injured. The fibula bone tends to prevent the ankle from moving far enough to sprain or overstretch the ligaments on the inside of the ankle. It simply does not allow the foot to move far enough to cause damage.
Another reason is that the medial ligaments on the inside of the ankle are much stronger than the lateral ligaments on the outside.
For this reason, an eversion sprain is often associated with a fracture of the fibula bone. Specifically at the lateral malleolus (bony part on the outside of the ankle). This is known as a Pott’s fracture.
Other bones in the ankle such as the talus can also be fractured during an eversion ankle sprain depending on the severity of the injury.
Treatment of medial ankle sprains
Initial treatment should involve applying the PRICE principles of rest, ice, compression and elevation.
- Rest is important both immediately after injury as well as whilst the injury is healing. Continuing to walk or play on while it is painful will increase swelling and slow the healing process. If it is a severe sprain or a fracture is suspected then seek immediate medical assistance. An X-ray may be required to determine the extent of the injury.
- Apply ice or cold therapy immediately after the injury. Ice should not be applied directly to the skin. Wrap it in a wet tea towel, or use a commercially available hot and cold pack which are often more convenient.
- You can apply cold for 10 to 15 minutes every hour for the first 24 to 48 hours. Then reduce the frequency as symptoms improve.
- Compression with an ankle taping or compression bandage will protect the joint from further injury and help reduce swelling. Elevating the limb encourages the swelling and tissue fluids to flow away from the site of injury.
- This treatment should continue until all bleeding has ceased (usually 48-72 hours). Further treatment should involve regaining full mobility and strengthening the ankle to prevent future injuries.
Eversion ankle sprain rehabilitation
Medial ligament sprains are treated the same way as lateral ankle ligament sprains. However, recovery can take twice as long.
Following an ankle eversion sprain, the joint often becomes very stiff and the range of motion at the joint is reduced considerably. Mobility exercises for the ankle can start very early in the rehabilitation process from day 2 in mild to moderate sprains.
Lateral (sideways) movements should be avoided in the early stages so as not to put any stress at all on the injured ligaments. Later when pain allows exercises with lateral movements involving sideways motion can be done.
When pain allows, isometric or static strengthening exercises can begin. As your injury heals you progress to dynamic exercises involving movement and eventually functional and sports specific exercises should be done. These will involve plyometric (hopping) exercises as well as drills involving change of direction.
As the injury improves and pain allows ankle strengthening exercises and exercises to improve proprioception such as wobble balance board exercises should be done.
Read more on ankle rehabilitation exercises.