Long bags of hard bumps on finger joints may be gout, or osteoarthritis, common warts, cysts, corns and other diseases. It is recommended to go to the hospital to clarify the cause of the disease. 1. Gout: If the concentration of uric acid in the body is too high, gout stones will be formed, resulting in long bags of hard bumps on the finger joints, and accompanied by red, swollen, hot, painful skin and other inflammatory reactions. 2. Osteoarthritis: with joint cartilage damage as the main, hand osteoarthritis manifested in the interphalangeal joint extension surface of the inner and outer bone-like swollen nodules, accompanied by pain, stiffness. 3. common warts: is caused by human papilloma virus infection caused by the skin superfluous organisms, may also lead to the finger joints long bag of hard bumps, the appearance of the surface is rough, hard texture, press may have painful symptoms. 4. Cysts: such as sebaceous cysts, sebaceous gland ducts blocked glandular secretions, the formation of cystic structures, also manifested in the joints of the fingers long bag hard bumps. 5. Corns: are caused by localized excessive friction, excessive hyperplasia of the stratum corneum will cause protruding skin keratinous plugs, pressing will also have painful symptoms. It may also lead to a hard bump on the knuckle. Finger joints long bag hard bumps, there may be other reasons, need to go to the hospital in time to check, clear cause of the treatment as prescribed by the doctor.