Patients with hard bumps on the fingers first consider the presence of calluses, i.e. calluses, which are mostly caused by localized friction as the patient’s fingers are engaged in repetitive movements for a long time. They may also be caused by the presence of common warts, flat warts, dermatofibromas or sebaceous cysts, and epidermal cysts formed after trauma. In addition, some of the gout, tendon cysts, synovitis, osteophytes, etc. can also lead to hard bumps on the fingers of patients: 1, common warts: if the patient’s fingers at the hard bumps performance of gray-brown, rough surface, hard, keratinized obvious, then consider the common warts. The cause is mostly related to insect bites, minor local trauma, personal constitution, etc.; 4, sebaceous cysts: due to blockage of sebaceous ducts, sebaceous cystic epithelium is blocked by gradually increasing contents and formed, which can also lead to similar symptoms; 5, epidermal cysts: these cases do not belong to the disease, but are related to the disease, mostly due to trauma resulting in the accumulation of keratin at the finger and gradually 6, gout: patients due to uric acid crystals deposition, can lead to irregular masses at the finger, but also accompanied by increased skin temperature, joint pain, etc.; 7, tendon sheath cysts: manifested as well-defined, mostly movable, round cysts, cyst size, can affect the local joint activities; 8, synovitis: if patients appear finger joint pain, swelling, fluid accumulation and accompanied by skin temperature Synovitis is considered when the patient has clinical symptoms such as increased skin temperature and restricted joint movement; 9, osteophytes: the symptoms can also occur when the patient has bone spurs in the finger area, mostly due to external trauma, excessive exercise, or the patient’s own osteoporosis; 10, rheumatoid nodules: seen in patients with rheumatoid arthritis, nodules of varying sizes, painless, not easy to move, symmetrical distribution, often found in elbows, fingers and other joints.