What are the symptoms of knee arthritis?

The symptoms of knee arthritis are:

Knee pain and swelling begin to occur after physical activity. These symptoms gradually increase and eventually are present even at rest. In severe cases patients may have pain at night, as well as during the day. Motion in the joint decreases, and straightening and bending the knee becomes severely limited.

Arthritis can cause crepitus, which is a grinding noise in the knee during motion. Other symptoms include an inability to walk for long distances, difficulty rising from a chair, climbing stairs, and eventually, difficulty with routine activities.