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

### input:
While doing squats I heard a pop, I didn t feel anything, but the next day my knee was twice it s size. I had a huge ball on the outside top part if the knee it also hurts to bend and experience pain on the inside part if my leg near the knee. What to do?

### output:

Hello, I have studied your case. According to your symptoms and findings there is osteoarthritis of your knee. You can start cartilage protecting medication like Chen Chat Doctor. I will advise doing X-ray knee and if required MRI knee can be done. Physiotherapy like ultrasound and tens will help, along with knee exercises.Lifestyle changes will help in reducing pain which include, LOAD REDUCTION : Protecting the joint from excessive load may slow down the rate of cartilage loss. It is also effective in relieving pain. The heavier you are, the more stress you put on your joints. Weight reduction for obese patients, wearing shock-absorbing shoes, avoiding activities like climbing stairs and using a walking stick are worthwhile. ACTIVITY MODIFICATION -It is important to maintain as much activity and joint motion as possible, but impact activities will aggravate arthritis. Running and jumping will often accelerate cartilage loss from the joint. The key is to focus on low impact activities, such as swimming or cycling.  USING CANES: Assistive devices can make it easier to go about your day without stressing your painful joint. A cane may take weight off your knee or hip as you walk. Carry the cane in the hand opposite the leg that hurts. ANALGESIC MEDICATION : Simple over the counter medications like acetaminophen is sufficient in most cases. If this fails to control pain, a non-steroidal anti-inflammatory 