About ankle sprain and chronic ankle instability
Most ankle sprains happen when the foot rolls inward and stretches or tears the ligaments on the outer side of the ankle. These ligaments are important for stability and also contain nerve endings that help your brain sense the ankle's position.
Many sprains heal well, but if rehab is cut short, the ligaments may heal loose and the balance system may not fully recover. That combination leads to repeated rolling, a feeling of the ankle giving way on uneven ground, and lingering pain. This is called chronic ankle instability.
A high ankle sprain is a different injury that affects the ligaments connecting the two lower leg bones just above the ankle. It often comes from the foot twisting outward, tends to take longer to recover, and needs its own careful assessment.
Common symptoms
- Pain, swelling, and bruising on the outer ankle after a roll
- Repeated rolling or giving way, especially on uneven ground
- A feeling that the ankle is loose or unreliable
- Lingering ache or swelling months after the original sprain
- Pain higher up, above the ankle, with twisting in a high ankle sprain
Common causes and risk factors
- Rolling the foot inward while landing, cutting, or stepping on uneven ground
- A prior sprain that did not complete rehab
- Reduced balance and position sense after injury
- Weakness in the muscles along the outside of the lower leg
- The foot twisting outward, which can cause a high ankle sprain
How we diagnose it
Our physicians examine the ankle for tenderness, swelling, and ligament looseness, and check balance on the injured side. Diagnostic ultrasound at the exam table lets us see the outer ankle ligaments and the high ankle ligaments directly and grade how badly they are injured, often while gently stressing the ankle. We order an X-ray when there is tenderness over specific bony spots or when you cannot take a few steps on the ankle, since those signs raise concern for a fracture. An MRI is referred when cartilage injury or another hidden problem is suspected.
How Propel treats ankle sprain and chronic ankle instability
Treatment starts with protection and bracing matched to the grade of injury, followed by a rehabilitation program that restores motion, strength, and especially balance and proprioception. Single-leg balance work, hopping, and sport-specific drills retrain the ankle's control and lower the chance of rolling it again. Many people use a lace-up brace or tape for sport during the return phase.
When ligament pain lingers despite good rehab, ultrasound-guided PRP may support healing of the injured ligament, and a guided injection can calm irritation in or around the joint. If the ankle remains truly unstable after a full course of rehab and bracing, or if there is cartilage or bone damage, we refer to trusted orthopedic surgeons for an opinion on ligament repair.
What to expect at your visit
- 1.
We listen first
Your visit opens with a real conversation: how the problem started, what you have already tried, and the activity you want back.
- 2.
Exam and in-office ultrasound
A hands-on exam, then ultrasound at the exam table, often while you move, so your physician can see the tendon, joint, or nerve involved.
- 3.
A clear diagnosis and plan
You leave knowing what is wrong and what your options are, from strength-based rehab to procedures, and why we recommend each one.
- 4.
Treatment and follow-through
Most procedures happen here in the office. We coordinate with your physical therapist and check progress against the goals you set.
Questions about ankle sprain and chronic ankle instability
- Do I need an X-ray for my sprained ankle?
- An X-ray is recommended when you cannot take several steps on the ankle or when specific bony spots on the ankle or foot are tender to the touch. Without those signs, a fracture is unlikely, and ultrasound can assess the ligaments in the office.
- Why does my ankle still hurt months after a sprain?
- Lingering pain can come from a ligament that healed poorly, reduced balance control, irritation inside the joint, or an injury that was missed at the start, such as a high ankle sprain or cartilage damage. A careful exam and ultrasound help find the source.
- Should I wear an ankle brace for sports?
- A lace-up brace or tape is a reasonable choice after a sprain, especially while you finish rehab and return to play. Balance training remains the most important long-term protection.
- Is a high ankle sprain worse than a regular sprain?
- It usually takes longer to recover because the ligaments between the two leg bones are stressed with every step. Severe high ankle sprains that let the bones separate may need a surgical opinion, which is why accurate grading matters.