### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
I have knee pain in the right leg. It is caused when i hold the knee for sometime (say watching movie in theatre, or some bus travelling for 1 hr). When i walk, run there is no pain but when i hold the knee and release the leg there is pain (there is no pain when i hold the leg fully or stretched fully). When consulted the doctor, he ask me to take 3 tablets (Enzomac, Rantac and Movon) and also pshsiotherapy. Want to know the cause of knee pain

### output:

Hi, There are several reasons for pain in the knee. Pain that increases while standing and sitting for long periods of time may be seen with a muscle strain, muscle imbalances, or with osteoarthritis.  It would be a good idea to check for swelling compared to the other side by looking at the knees in the mirror. If there is swelling, the following regimen can be attempted.  POLICE is currently the best therapy to treat the symptoms and the underlying condition. POLICE stand for: - Protection-Optimal Loading-Ice- Compression- Elevation Protection involves preventing the knee from getting injured further. This is done by avoiding exercise, excessive standing, or excessive sitting. Optimal loading involves doing basic rehab exercises like static quad stretches, knee extensions, clam exercises, and knee slides.  Post this, Icing the area for 15 mins every hour can help as well. Lastly, sleeping with raising the legs by placing a few pillows under the leg can help move blood flow to the heart as well.  Some people may benefit from over the counter painkillers as well. In case all of the above does not help reduce the pain, it would be a good idea to get imaging like MRI, X-rays, or a bone density scan done.  Hope I have answered your query. Let me know if I can assist you further. Take care Chat Doctor. 