Arthritis generally does not cause one side of the leg swelling and numbness. 1. Arthritis is due to joint strain to form aseptic inflammation or due to trauma and infection to form infectious inflammation, generally more confined to the joints around the majority of arthritis does not generally cause leg swelling and numbness. If there is more fluid in the joints, and the blood vessels in the legs are compressed, it can cause mild swelling of the legs, but it will not cause numbness in general. 2. Most of the leg swelling is related to the obstruction of blood vessel reflux, such as varicose veins in the lower limbs, venous thrombosis, etc. It may also be related to heart disease, kidney disease and other reasons. 3. Numbness is generally related to nerve compression, such as the spinal cord, nerve roots central nerve compression will appear buttocks and the whole lower limb numbness and pain, if the peripheral nerve compression can cause local numbness and pain. If the symptoms of arthritis leg swelling and numbness, it is recommended that patients go to the hospital to improve the examination and receive regular treatment.