It's a synovial effusion or the layer surrounding the knee space getting inflamed due to over exertion - use ice, local analgesics and a crepe bandage. Avoid squatting and climbing stairs if possible. Use oral anti-inflammatory medicines - Piroxicam 20 mg once a day/ Aceclofenac 100 mg in combination with paracetamol twice a day or any other NSAID for 5 days. Get evaluated for possible early arthritic changes and life style modifications to manage the same

This treatment is being suggested on bases of the information provided. However I would like to examine & investigate you in detail. -Control  Hypertension, Diabetes or  metabolic disorder, if there is any.  - Sleep on a hard bed with soft bedding. - Keep a pillow under the knee. - Avoid painful acts & activities. - Fomentation with warm water. -Let the part not be exposed cold. -Do mild exercises for the affected part.-  lower limbs  -Any way it may be tried, --. Ugesic (Piroxicam) 20mg 1tab once  a day x 5days  --. Caldikind plus  (Mankind) 1tab Once  a day x 10 days. Kindly make sure, there is no allergy to any of these medicines. --For emergency treatment visit nearest hospital. -For exercises you may visit my YouTube channel- Dr. N C gupta. -Wish you a quick recovery & good health  kindly like & subscribe to the channel to get notification for subsequent videos of your intrest. it is free.  Dr N C Gupta MS (ortho) DMC 3624

Get xray knee in standing position

Get an x ray for your knee .