I have this bubble like thing on the top of my knee cap. But only when i bend it.
Patient :My knee has a bubble like thing when I bend it. And only when I bend it. It has no pain and it is soft. But during sports that knee starts to hurt and swell up. It feels like air. It is located above my knee cap and a little to the inside. I have hyperextended my knee and play basketball. Would you please give me a idea of what it is?
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.