Understanding Ankle Sprain

Side view of bones of lower leg and foot showing ligaments.The ankle is the joint where the leg and foot meet. Bones are held in place by connective tissue called ligaments. When ankle ligaments are stretched to the point of pain and injury, it is called an ankle sprain. A sprain can tear the ligaments. These tears can be very small but still cause pain. Ankle sprains can be mild or severe.

What causes an ankle sprain?

A sprain may occur when you twist your ankle or bend it too far. This can happen when you stumble or fall. Things that can make an ankle sprain more likely include:

  • Having had an ankle sprain before

  • Playing sports that involve running and jumping. Or playing contact sports such as football or hockey.

  • Wearing shoes that don’t support your feet and ankles well

  • Having ankles with poor strength and flexibility

Symptoms of an ankle sprain

Symptoms may include:

  • Pain or soreness in the ankle

  • Swelling

  • Redness or bruising

  • Not being able to walk or put weight on the affected foot

  • Reduced range of motion in the ankle

  • A popping or tearing feeling at the time the sprain occurs

  • An abnormal or dislocated look to the ankle

  • Instability or too much range of motion in the ankle

Treatment for an ankle sprain

Treatment focuses on reducing pain and swelling, and avoiding further injury. Treatments may include:

  • Resting the ankle. Avoid putting weight on it. This may mean using crutches until the sprain heals.

  • Prescription or over-the-counter pain medicines. These help reduce swelling and pain.

  • Cold packs. These help reduce pain and swelling.

  • Raising your ankle above your heart. This helps reduce swelling.

  • Wrapping the ankle with an elastic bandage or ankle brace. This helps reduce swelling and gives some support to the ankle. In rare cases, you may need a cast or boot.

  • Stretching and other exercises. These improve flexibility and strength.

  • Heat packs. These may be recommended before doing ankle exercises.

Possible complications of an ankle sprain

An ankle that has been weakened by a sprain can be more likely to have repeated sprains afterward. Doing exercises to strengthen your ankle and improve balance can reduce your risk for repeated sprains. Other possible complications are long-term (chronic) pain or an ankle that remains unstable.

When to call your healthcare provider

Call your healthcare provider right away if you have any of these:

  • Fever of 100.4°F (38°C) or higher, or as directed

  • Pain, numbness, discoloration, or coldness in the foot or toes

  • Pain that gets worse

  • Symptoms that don’t get better, or get worse

  • New symptoms

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