Ankle Sprains: When to Get an X-Ray and How PT Helps
Recently rolled your ankle? You're not alone. Ankle sprains are one of the most common musculoskeletal injuries. Whether it happened during sports, running or simply stepping off a curb, proper evaluation and rehab are essential for a full recovery. This guide covers when to consider an X-ray, how physical therapy helps and what to expect during recovery.
What happens during an ankle sprain?
A sprain is an injury to a ligament, the connective tissue that links one bone to another and provides passive stability to a joint.
The most common type: lateral ankle sprain
A lateral ankle sprain, also called an inversion sprain, occurs when the ankle is forcefully rolled inward. This overstretches or tears the ligaments on the outer side of the ankle. The ligaments most commonly affected are:
- ATFL (anterior talofibular ligament)
- CFL (calcaneofibular ligament)
These ligaments help stabilize the ankle, especially during weight-bearing and quick changes in direction.
How physical therapy helps after an ankle sprain
Seeing a physical therapist after an ankle injury is one of the most effective ways to:
- Speed up healing
- Reduce swelling and pain
- Restore joint mobility
- Prevent chronic ankle instability
- Return to sports or exercise safely
Early physical therapy goals
- Reducing swelling and inflammation
- Restoring ankle mobility in all directions
- Normalizing walking mechanics, especially if a limp is present
- Improving balance and proprioception
- Gradually increasing impact tolerance to return to squatting, running, jumping and sports
A physical therapist also provides guidance on load management, taping or bracing, and individualized strengthening to ensure long-term success.
How long does ankle sprain recovery take?
Recovery time depends on the grade of the sprain:
| Grade | What happens | Typical recovery |
|---|---|---|
| Grade 1 (mild) | Microscopic tearing, minimal swelling | 1–3 weeks |
| Grade 2 (moderate) | Partial ligament tear, noticeable swelling or bruising | 3–6 weeks |
| Grade 3 (severe) | Complete ligament tear, significant swelling or bruising | 8+ weeks, possibly longer |
Early physical therapy improves outcomes for all grades of sprain and decreases the risk of reinjury.
When should you get an X-ray? The Ottawa Ankle Rules
The Ottawa Ankle Rules help determine whether an ankle or foot fracture may be present. Seek imaging (an X-ray) if you have:
1. Difficulty bearing weight
- Unable to walk immediately after the injury
- Unable to take 4 full steps at evaluation
2. Bone tenderness at any of these areas
- Lateral malleolus (outer ankle bone)
- Medial malleolus (inner ankle bone)
- Base of the 5th metatarsal (outer midfoot)
- Navicular (inner midfoot bone)
If a fracture is present, crutches or a walking boot may be needed temporarily to protect healing tissues.
Dealing with a new or chronic ankle injury?
We can help if you have:
- A new ankle sprain
- Ongoing instability
- Chronic pain from an old injury
- Trouble returning to running or sports
A physical therapist can evaluate your ankle, rule out red flags and guide you through a safe, structured rehab plan.
Rolled your ankle or still dealing with an old sprain? Let's get you back to full strength.
book a sessionthe takeaway
Most ankle sprains heal in 1–8+ weeks depending on the grade. Use the Ottawa Ankle Rules to decide whether you need an X-ray, and start physical therapy early to improve outcomes and lower your risk of reinjury.
Frequently asked questions
Do I need an X-ray for a sprained ankle?
Per the Ottawa Ankle Rules, seek an X-ray if you couldn't walk immediately after the injury or can't take 4 full steps at evaluation, or if you have bone tenderness at the outer or inner ankle bone, the base of the 5th metatarsal or the navicular.
How long does a sprained ankle take to heal?
It depends on the grade: about 1–3 weeks for a mild (grade 1) sprain, 3–6 weeks for a moderate (grade 2) sprain, and 8+ weeks or longer for a severe (grade 3) sprain.
Should I see a physical therapist for an ankle sprain?
Yes. Physical therapy can speed up healing, reduce swelling and pain, restore mobility, help prevent chronic ankle instability and get you back to sports or exercise safely.
Which ligaments are injured in a rolled ankle?
In a lateral (inversion) ankle sprain, the ligaments most commonly affected are the anterior talofibular ligament (ATFL) and the calcaneofibular ligament (CFL) on the outer side of the ankle.
