Pain in the back of the foot may be gout.
Gout is a group of clinical syndromes caused by disorders of purine metabolism and impaired uric acid excretion. The main clinical feature is hyperuricemia, which is characterized by recurrent arthritis, gout stone formation and joint deformity, and in severe cases can lead to osteoarthrosis and joint movement and deformity. When gouty arthritis first develops, most of the attacks are on a single joint, with the first metatarsophalangeal joint being the most common, and occasionally polyarthritis can occur at the same time.
In addition, the possible causes of dorsal foot pain include flat feet, strenuous exercise, peripheral neuritis, lumbar disc herniation, osteophytes, and unsuitable shoes.