Plantar fasciitis and metatarsal tendinitis, these two diseases are essentially the same type of disease clinically. In professional clinical terms, it is called metatarsal tendinitis, commonly known as plantar fasciitis. The anatomical location is mainly on the sole of the foot, extending from the 1-5 metatarsophalangeal joints to the position of the calcaneal tubercle. Our soles have a very thick layer, resembling a tendon sheath, which is a very important structure that supports the arch and normal walking. Plantar fasciitis and metatarsal tendinitis essentially occur in the same location, with only a difference in terminology.