Quick answer
An ankle sprain is an injury to the ligaments that hold the ankle together — most commonly the ligaments on the outside of the ankle, which get stretched or torn when the foot rolls inward. The big myth: that a sprain is “no big deal.” Inadequately rehabbed sprains are the #1 cause of chronic ankle instability.
How to recognize one
- Specific moment of injury — usually rolling the ankle inward
- Sometimes a “pop” sound at the time
- Pain on the outside of the ankle
- Swelling — often within hours
- Bruising — can appear over 1–3 days, sometimes traveling down to the foot or up the leg
- Difficulty bearing weight — variable depending on severity
- Stiffness in the days afterward
Severity grading
| Grade | What’s happened | Recovery |
|---|---|---|
| I (mild) | Ligaments stretched, microscopic tears | 1–3 weeks |
| II (moderate) | Partial tear of ligament fibers | 3–6 weeks |
| III (severe) | Complete tear of one or more ligaments | 6+ weeks; sometimes surgical |
When to get an X-ray (the Ottawa Ankle Rules)
You probably need an X-ray if any of these are true:
- You can’t bear weight for 4 steps right after the injury or in the ER
- Bone tenderness on the back edge or tip of either malleolus (the bony prominences on either side of the ankle)
- Bone tenderness over the navicular or fifth metatarsal base (specific midfoot bones)
Most ankle sprains don’t need X-rays. The rules are 95%+ sensitive for fractures — they’re a good sorting tool.
Treatment — modern approach
The classic “RICE” (Rest, Ice, Compression, Elevation) has been updated. The current evidence-based approach is PEACE & LOVE:
First few days (PEACE)
- Protection — avoid loading that hurts
- Elevation — ankle above heart level when possible
- Avoid anti-inflammatories — NSAIDs may slow healing in the first 1–2 days; acetaminophen is fine for pain
- Compression — wrap to limit swelling
- Education — understand the injury and the timeline
After the first few days (LOVE)
- Load — start gentle weight-bearing as tolerated
- Optimism — expectations matter; most heal well
- Vascularization — get blood moving with cardiovascular activity
- Exercise — progressive rehab is the most important intervention
What rehab actually looks like
Days 1–7:
- Gentle ankle pumps, alphabet drawing with your foot
- Walking as tolerated
- Compression brace or sleeve
Weeks 1–3:
- Calf stretches
- Resistance band exercises
- Single-leg balance (start two-legged, progress)
Weeks 3–6:
- Single-leg balance with eyes closed
- Hopping, jumping
- Sport-specific drills
The single most important thing for preventing chronic instability is proprioception/balance training — your nervous system has to relearn where the ankle is in space.
When sprains don’t heal — chronic ankle instability
About 20% of sprains lead to chronic instability — the ankle gives way easily, often re-sprains, feels weak. Two things are happening:
- Mechanical instability — the ligaments themselves are loose
- Functional instability — the nervous system’s “sense” of the ankle is impaired
Treatment is dedicated balance and strengthening rehab. For severe cases that fail rehab, surgery (Broström-Gould or anatomic reconstruction) tightens the ligaments.
When to see a clinician
- Can’t bear weight for 4 steps after injury or after a few hours of rest
- Severe deformity or visible bone displacement
- Pain over specific spots that meet the Ottawa rules
- “Pop” with significant pain — could indicate a higher-grade injury or fracture
- Bruising spreading up the leg or into the foot
- Symptoms not improving after 1–2 weeks
- Repeated sprains — suggests instability that needs targeted rehab
- Pain that doesn’t fit the typical pattern (e.g., over the front of the ankle, deep ankle, midfoot pain)
Prevention
Once you’ve sprained an ankle, you’re 5+ times more likely to sprain it again. Take it seriously:
- Don’t return to sports too early — pain-free walking ≠ ready for cutting and pivoting
- Balance training — single-leg balance daily for at least 6 weeks after sprain
- Bracing — for high-risk activities (basketball, soccer, hiking) for at least 6 months after a moderate-to-severe sprain
- High-top shoes for some sports (limited evidence but reasonable)
- Address the cause — prior sprains, weak peroneal muscles, high arches all increase risk
Frequently asked questions
How long does it take a sprained ankle to heal?
Mild (Grade 1) sprains typically heal in 1–3 weeks. Moderate (Grade 2) sprains take 3–6 weeks. Severe (Grade 3) sprains involve complete ligament tears and can take 3–6 months for full recovery. Even after pain resolves, full strength and proprioception take longer — that's why rehab matters.
How do I know if my ankle is sprained or broken?
Both can cause pain, swelling, and bruising. The Ottawa Ankle Rules help: an X-ray is recommended if you have pain along the bone (not just over the ligament), can't bear weight for four steps right after the injury or in the ER, or have tenderness over specific bony landmarks. When in doubt, get imaging — missed ankle fractures cause long-term problems.
Should I walk on a sprained ankle?
Yes, gradual weight-bearing as tolerated is generally encouraged after the first 24–48 hours — early movement speeds recovery. Use crutches or a brace if needed for support. Complete immobilization for more than a few days actually slows recovery and increases stiffness. If you can't bear any weight after 24 hours, get evaluated.
What is RICE for ankle sprains?
Rest, Ice, Compression, Elevation — the first-line approach for the first 48–72 hours. Rest the ankle (no aggravating activity), ice 15–20 minutes every few hours, compression with an elastic wrap, elevate above heart level when sitting. Many clinicians now add 'P' for Protect (brace or support) and emphasize early gentle motion after the first day.
Why do my ankles keep spraining?
A previous ankle sprain is the single biggest predictor of future sprains. Ligaments stretched in the original injury heal looser, and the proprioception (joint position sense) is impaired. Without rehabilitation — particularly balance training and strengthening — recurrent sprains and chronic ankle instability develop in up to 40% of patients.
When should I see a doctor for a sprained ankle?
See a clinician same-day if you can't bear weight, the ankle is severely deformed, the pain is severe, or you suspect a fracture. See within a few days if there's significant swelling that doesn't improve, instability (the ankle 'gives way'), numbness, or no improvement after 1 week of self-care. Never ignore recurrent sprains — they need rehab to prevent chronic instability.
Last updated: May 1, 2026
About the author
Written and reviewed by a Doctor of Podiatric Medicine (DPM) practicing in Arizona for 6+ years. Board-certified by the American Board of Podiatric Medicine (ABPM); graduate of Midwestern University Arizona College of Podiatric Medicine.
Last clinically reviewed: May 1, 2026