The knee is the knee joint, knee joint redness, swelling and burning pain for many reasons, such as septic arthritis, rheumatoid arthritis, synovitis and so on.
1. septic arthritis: mostly caused by bacterial infections, occurring in the knee joints mainly manifested as knee joints, redness, swelling, heat, pain and activity limitation, often accompanied by chills, high fever and other systemic symptoms.
2. Rheumatoid arthritis: a chronic, inflammatory synovitis-based systemic disease of undetermined etiology, the affected joints are mostly symmetrical, susceptible joints are hands, feet, knees, ankles and so on, if it occurs in the knee joints, it can be manifested as red, swollen and hot pain in the knee joints, which is mostly accompanied by joint deformity.
3. Synovitis: synovial inflammatory changes caused by various reasons, can be caused by trauma, infection, tuberculosis and other factors, involving the knee joint, also manifested as knee joint swelling, pain and activity restrictions.
There may be other causes of knee joint redness, swelling and pain, such as gout, etc. If the above symptoms occur, you should go to the hospital in a timely manner, so as not to delay treatment and aggravate the condition.