Knee arthritis has commenced is when the knee joint starts to ache, becomes swollen, reddens and heats up. At first the ache will not be severe, however, after more than general use of the knee, e.g., when walking for long distances; sitting for a long period of time; tripping but not falling down; or walking on a non-smooth surface, such as in the garden or in the golf course, the patient will develop this ‘ache’. Additionally, some swelling will also start to develop along the knee joint line. When the skin in this area is touched or caressed, the patient will often feel a sensation of heat and feel like the area itself is ‘warming up’. When compared to the other knee, the effected knee will be redder in colour.