Plantar fasciitis, degenerative osteoarthritis and other causes should be considered in the case of pain when the foot is stepped on, as follows: 1. Plantar fasciitis: for example, usually often walking with weight, going up and down the stairs, climbing, etc., which will cause the plantar fascia to be subjected to a greater load, and over time there will be aseptic inflammation of plantar fascia, which will be manifested as pain in the soles of the feet, so the foot stepped on it will trigger the plantar fasciitis, which will cause the pain. 2, Degenerative osteoarthritis: this disease occurs in the elderly patients, due to the gradual wear and tear of articular cartilage, the joints are easy to stress concentration, so it is easy to cause joint pain in the normal amount of activity, so the foot will cause ankle pain, which is more normal.