Swelling and pain in the right foot can be caused by the following diseases: first, poor venous blood flow, the patient has varicose veins in the lower extremities, specifically including saphenous varicose veins and small saphenous varicose veins, the drainage area is different, with the evolution of the disease, there will also be thrombophlebitis, the patient will also lead to distal reflux restriction after activity, swelling and pain, but also manifest skin pigmentation, ulcer formation In severe cases, local thrombosis can be formed and the patient can experience significant pain and fever. Second, some patients are caused by bone and joint diseases, osteoarthritis or local fasciitis, fascial cysts, the patient will also show obvious swelling and pain, especially after the activity will also lead to the aggravation of symptoms, through physical therapy methods such as hot compresses, massage, acupuncture can reduce the symptoms.