Hammertoe deformity of the toes can occur either on its own or accompanied by other deformities of the foot as a consequences of spastic cerebral palsy, poliomyelitis, flat-valgus foot, hollow foot, etc.
Characteristic is the formation of painful calluses under the toes (hyperkeratosis), which prevent wearing normal shoes. In case of this disease, it is desirable to use special silicone inserts, as well as individual insoles with an additional pad for the fingers.