A painful bump on the dorsum of the foot is an abnormality that is commonly caused by tendon sheath cysts, osteophytes, and other pathologies, and should be examined by a doctor to confirm the diagnosis. A painful bump on the dorsum of the foot may be caused by a tendon sheath cyst. The incidence of this disease on the back of the foot is also relatively high, this kind of cyst grows to a certain extent can be accompanied by soreness or slight swelling and pain. It is mostly hemispherical elevation in the superficial subcutaneous, the surface skin can be pushed, no adhesion, clear boundaries, the lump is tough, a few soft. Osteomalacia is also one of the common causes of raised bones on the back of the foot accompanied by pain. There are many causes of osteophytes, such as heavy physical labor, trauma, excessive exercise, malnutrition, osteoporosis, biochemical changes in bone and cartilage, and malnutrition. Symptoms can be caused by local changes in bone structure, changes in the local surrounding tissues or abnormalities in other tissues, which can lead to corresponding symptoms, such as localized bumps, pain, local discomfort, etc. In addition, the bone bulge at the dorsum of the foot accompanied by pain may also be caused by some other causes. It is recommended to go to the orthopedic department of the hospital as soon as possible for appropriate examination to clarify the cause of the disease, and then give the correct treatment under the guidance of professional doctors.