There is a small bump on the elbow that hurts when you touch it, the possible causes are folliculitis, boils, carbuncles, gout, bursitis and other causes, usually according to the cause of the symptomatic treatment. 1. Folliculitis and boils, carbuncle: most of them are caused by Staphylococcus aureus infection, bacterial infectious skin disease of hair follicles and their surrounding tissues. Early unpurulent should 20% ichthyolite ointment, 3% iodine tincture, can also use mupirocin ointment. Systemic treatment can be treated with antibiotics such as penicillin. 2. Gout: chronic gout will appear as gout stones in joints and other places. Manifested as elevated serum uric acid. Generally use drug treatment, such as allopurinol, febuxostat and other drugs to inhibit uric acid synthesis. At the same time, you can also use benzbromarone, probenecid and other drugs to promote uric acid excretion. 3. Bursitis: It is manifested as the gradual appearance of a round or oval-shaped swelling in the joint or bone protrusion without obvious reasons, which grows slowly with pressure pain. It can be cured by puncturing the cyst and extracting the fluid, then injecting prednisone acetate and applying pressure bandage. For those for whom non-surgical treatment is ineffective, bursa excision can be used, but there is a risk of recurrence. There may be other reasons why a small bump on the elbow hurts when you touch it, so you need to consult a doctor in time and follow the doctor’s instructions for standardized treatment, and do not use your own medication.