Overview
The kneecap usually slips to the outside when the knee twists with the foot planted.
After the first time, it can happen again, especially in teens.
Symptoms
Common signs:
- Kneecap out of place
- Joint popped out of place
Less common
- Swelling
Look up a symptom: Joint popped out of place · Joint swelling or twist injury
When to get medical care
Causes
Twisting.
Who is more likely to get it
- Teens
Diagnosis
Exam and X-ray.
Tests
Tests, if needed:
- X-ray:
- MRI:
Treatment
Rest and brace.
Self-care
- Ice
- Brace
Medicines
Medicines that may help:
| Medicine | Helps with | Good to know |
|---|---|---|
| Pain relievers | Pain and swelling | Ask first if you have kidney, stomach, or heart problems. |
OwieClear doesn't give doses: follow the label or your healthcare professional. Medicine names here are examples, not a full list.
Prevention
- Thigh strengthening
Which doctor treats this
- Urgent care or the ER can treat it first. For minor problems, your primary care provider can help.
- They may send you to an orthopedist (bone and joint doctor).
- A physical therapist can help with exercises to rebuild strength and motion.
Back to school, work, or sports
- School or desk work is often OK within days. Jobs with lifting may need light duty for a while.
- Go back to sports only when your doctor says it's OK and you have full motion and strength without pain.
Children, pregnancy, and older adults
- Teen girls: More common.
Outlook
Most heal.
Most return to sports after rehab.
Getting ready for your visit
Bring a list of your symptoms and medicines.
Questions to ask
- Do I need an MRI?
Research studies
Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.
Search ClinicalTrials.gov for studies on Kneecap dislocation (dislocated patella)
Sources
Last updated 2026-11-12.