Knee pain can be caused by dozens of different problems. Massage by a medical professional who knows your diagnosis can be helpful. Massage by someone who does not know what your knee pain is caused by can make your pain worse. You first have to get your knee evaluated by an orthopaedic surgeon to determine the cause of your pain, who can then prescribe appropriate treatment.

Yes, studies have show “ After eight weeks of massage, patients reported less knee pain and stiffness and better knee function”

You can massage the area which increased blood flow. You do have to see a physician who can diagnose your actual problem to determine a customized treatment plan for your recovery.

It really depends on the source of pain. Pain is always an indication that something isn't right. An appointment with your PC may be the best solution and perhaps a referral to a specialist. Knowing what caused the pain such as an injury would be very important information.

Depends on Pain type and knee structure.
You can do but gently or softly. Cover with warm towel after massage.

Usually not.