- An ankle sprain is a stretch or tear of the ligaments that stabilize the ankle, usually from rolling the foot inward.
- The first sprain is the biggest risk factor for the next — because the ankle is often never fully rehabbed.
- Physical therapy restores motion, then rebuilds the strength and balance (proprioception) that keep the ankle stable.
- Chronic instability — an ankle that keeps giving out — responds very well to a structured rehab program.
- No referral is needed in most cases. We see new patients within a few days at Cedar Mill, Tigard, and Milwaukie.
What are ankle sprains?
An ankle sprain happens when the ligaments that hold the ankle together are stretched or torn — most often when the foot rolls inward (an inversion sprain), injuring the ligaments on the outside of the ankle. Sprains are graded from mild overstretch to a more complete ligament tear, and they range from a quick bounce-back to weeks of swelling and difficulty bearing weight.
The bigger problem is what happens after. Many ankle sprains are treated with rest and a brace and never properly rehabbed — so the strength, motion, and balance never fully return. That leaves the ankle weak and "untrustworthy," and it rolls again. This cycle is called chronic ankle instability, and it is extremely common and very treatable.
At Creekside Physical Therapy, we rehab both fresh sprains and long-standing instability. Care starts by restoring motion and calming swelling, then progresses through strengthening and balance retraining, and finishes with sport- or activity-specific loading so the ankle can handle the demands you put on it. You work one-on-one with the same therapist throughout.
The ankle is stabilized by ligaments on both sides. The outer (lateral) ligaments — most often the anterior talofibular ligament — are injured in the typical inversion sprain. These ligaments not only hold the joint together but also feed the brain a constant stream of position information (proprioception) that lets you balance and react. When they are injured, both the mechanical stability and that sense of position are disrupted, which is why a poorly rehabbed ankle feels untrustworthy and keeps rolling.
What it feels like
Ankle sprains and instability produce a familiar set of symptoms:
- Pain on the outside of the ankle, especially with weight-bearing
- Swelling and sometimes bruising around the ankle
- Stiffness and reduced range of motion
- A feeling that the ankle is weak, wobbly, or about to give out
- Repeated rolling of the same ankle, especially on uneven ground
- Difficulty with quick changes of direction or balancing on one foot
- Lingering aching or instability long after the original injury
Why it develops
Sprains and the instability that follows develop for a few common reasons:
- Rolling the ankle on uneven ground, a curb, or another person’s foot
- Sports with cutting, jumping, and landing (basketball, soccer, trail running)
- A previous sprain that was never fully rehabbed
- Weakness in the muscles that stabilize the ankle and foot
- Poor balance and proprioception after an earlier injury
- Footwear with little support on uneven terrain
- Returning to sport before the ankle has regained strength and control
How we evaluate ankle sprains
Your first visit is a one-on-one physical therapy evaluation. Your therapist asks how the injury happened, tests your ankle’s range of motion and strength, checks ligament stability and your balance and single-leg control, and watches how you walk and load the foot. We do not use X-ray; if your history or exam suggests a possible fracture, we will refer you for imaging before starting loaded rehab. Most patients leave the same day with a clear diagnosis and a plan matched to where they are in healing.
How physical therapy treats it
Ankle sprains and chronic instability respond very well to a structured physical therapy program. Your one-on-one plan progresses through clear phases:
- Early care to calm swelling, protect healing tissue, and restore pain-free motion
- Manual therapy to restore normal ankle and foot joint mobility
- Progressive strengthening of the muscles that stabilize the ankle, foot, and lower leg
- Balance and proprioception retraining — the step most often skipped, and the one that prevents re-injury
- Agility, cutting, and landing drills for athletes returning to sport
- Gait retraining so you stop guarding and move normally again
- Taping, bracing, and footwear guidance during the return to activity
- A phased return-to-sport or return-to-activity plan and a home program to maintain stability
When to seek care
- An ankle sprain that is not steadily improving after a few days
- Inability to bear weight, or significant bruising and swelling — get evaluated medically to rule out a fracture
- An ankle that keeps rolling or giving out, even months after the original injury
- Lingering weakness, stiffness, or loss of confidence on uneven ground
- Recurrent sprains that are keeping you from sport or activity
Ankle sprains and chronic instability are treated by Creekside’s physical therapists at all three clinics. Chad Smurthwaite, DPT, OCS, leads return-to-sport rehab for athletes. In the uncommon case that a sprain involves a fracture or a ligament injury that needs surgery, we coordinate with your physician or surgeon and guide your recovery afterward.
Frequently asked questions
- Foot & Ankle TendinitisPeroneal tendons on the outside of the ankle are often involved after sprains
- Achilles TendonitisAnkle and calf mechanics overlap with Achilles loading
- Fractures & Foot ArthritisA severe sprain can involve a fracture — important to rule out
- Sports InjuriesAnkle sprains are among the most common sports injuries