Small bumps protruding from the elbow joints may be symptoms caused by eczema, neurodermatitis, tendon sheath cysts and other diseases. Patients need to go to the hospital in time to clarify the cause of the disease. 1. Eczema: Eczema is an inflammation of the superficial dermis and epidermis caused by a variety of internal and external factors. Patients may have erythema, papules and other skin lesions. As a result, patients with eczema may have the symptom of raised bumps on the elbow joints. 2. Neurodermatitis: Neurodermatitis is a chronic inflammatory skin disease caused by nerve dysfunction and friction stimulation. The patient can appear in the elbow joint area skin lesions raised small bumps manifestation, can also be manifested as round or polygonal flat papules. 3. Tendon sheath cysts: Tendon sheath cysts are cystic masses that occur near the joints and can manifest as raised bumps near the joints. The swelling is usually asymptomatic when it is small, and the joints may become sore and swollen when it grows to a certain extent. Patients with small bumps on the elbow joints should go to the hospital in time and under the guidance of the doctor for regular treatment.