I have hitted my knee and now have severe muscle pain around knee, might have some blood klotting too. have pain while standing on feet for long time.

Rest/see Dr.,,,: It depends on how long ago you hit your knee and how long these symptoms have lasted. If it was not too long ago, rest should help a lot along with ice/cold packs, if you can get them. If it has been a long time and/or if your pain around your knee and feet are much worse, go to your doctor/ hospital soon to get it examined to see if there is damage like ligament tears, heavy swelling, etc..

Needs evaluation: Needs evaluation for possible fracture or tendon/muscle damage.