Ankle sprains come in three grades, and the grade shapes everything that follows. Grade 1 is a stretch. Grade 2 is a partial tear. Grade 3 is a full tear. Clinicians use the grades to set the plan and the timeline, and you can read the broad signs yourself from how the ankle behaved in the first day or two. Self-grading has limits, and we are honest about them below.
We outline the grades first, then explain how to read your own, and finally, what the grade actually represents. Our MCSP-registered team at One Body LDN grades and treats ankle sprains across our London clinics every week.
Key Takeaways
- Grade 1 is a ligament stretch, grade 2 is a partial tear, and grade 3 is a full tear.
- Walking ability, swelling speed, and stability feel are the broad self-read markers.
- Self-grading narrows the picture. An assessment confirms it.
- The grade changes the plan and the timeline, not whether the ankle recovers.
- Most sprains, including severe ones, recover well with staged rehabilitation.
The Three Grades
Three grades describe how much of the ligament is damaged.
Grade 1: Stretched
The ligament is overstretched with tiny fibre damage. Mild swelling, little or no bruising. Walking is initially uncomfortable but manageable. The ankle feels sore rather than unstable.
Grade 2: Partially Torn
A meaningful portion of the ligament is torn. Clear swelling, bruising over the first day or two, and walking is limited at first. The ankle may feel loose or less stable on uneven ground.
Grade 3: Fully Torn
The ligament is ruptured. Swelling is significant and fast, weight-bearing is difficult early, and the ankle can feel distinctly unstable. This grade needs assessment, both to confirm it and to rule out other injuries.
How To Read Your Own Sprain
Three markers from the first days give a broad self-read.
Walking: comfortable-ish points toward grade 1, limited points toward grade 2, barely possible points toward grade 3. Swelling speed: slow and mild points low, fast and large points high. Stability: an ankle that feels sore but solid points low, one that feels loose or untrustworthy points higher. Take the three together, not any one alone.
And one check comes before all of this: an ankle that cannot take four steps, or hurts directly on the bone, needs urgent assessment for fracture first, a decision covered fully in our sprain-or-fracture guide coming next in this series. The early management steps are the same across grades at first, covered in our guide to the first 72 hours after a sprained ankle.
The Honest Limits Of Self-Grading
Self-grading narrows the picture. It cannot confirm it.
The markers above overlap between grades, especially in the first two days when swelling masks everything. Pain is an unreliable grader, because some full tears hurt less than partial ones once the initial shock passes.
Self-grading also cannot detect the injuries that sometimes accompany a sprain, to other ligaments, tendons, or the joint surface. So treat your self-read as a starting hypothesis.
An assessment tests the ligaments directly, compares against your other ankle, and grades with the swelling accounted for. Grade 2 and 3 patterns in particular deserve that confirmation, because their plans differ meaningfully.
What The Grade Actually Changes
The grade sets the pace and the plan, not the destination.
All three grades recover with the right approach, including full tears, which mostly do well with staged rehabilitation rather than surgery. What changes is pace and structure. Grade 1 moves quickly through the stages.
Grade 2 needs a steadier build with more attention to strength and balance. Grade 3 needs the most protection early and the most deliberate rebuild after. The recovery ranges for each are covered in our guide to how long a sprained ankle takes to heal. Whatever the grade, the destination is the same: an ankle that is strong, balanced, and trustworthy again.
Our sprained ankle team in London grades new sprains within days through direct access, no referral needed.
Note. Some ankle injuries need urgent assessment before any grading at home. Seek urgent care for an ankle that cannot take four steps, tenderness directly on the ankle bones, visible deformity, or a foot turning cold, pale, or numb.
Seek same-day medical review for calf swelling and tenderness in the days after injury, since reduced movement raises clot risk. Physiotherapists screen for these at assessment and refer onward the same day when they appear. Contact NHS 111 when unsure.
Frequently Asked Questions
We answer the grading questions that ankle patients ask most.
How do I know what grade my ankle sprain is?
Read three markers together: walking ability, swelling speed, and how stable the ankle feels. Comfortable walking with mild swelling points toward grade 1, limited walking with clear bruising toward grade 2, and difficulty with weight-bearing with fast swelling toward grade 3. An assessment confirms the grade.
Does a grade 3 sprain need surgery?
Most grade 3 sprains recover well with staged rehabilitation rather than surgery. Surgery is considered for specific cases, usually after rehabilitation has been tried or where other injuries are involved. Assessment establishes which path fits.
Can a sprain feel worse than its grade?
Yes, pain is an unreliable grader. Some partial tears hurt more than full ones, and early swelling exaggerates everything. Function markers, walking, swelling, and stability, read the grade better than pain intensity does.
References
- National Health Service. Sprains and strains: treatment and recovery.
- National Institute for Health and Care Excellence. Sprains and strains: management guidance.
- Chartered Society of Physiotherapy. Direct access to physiotherapy.
- Health and Care Professions Council. The register of physiotherapists.
