Patients with elbow joint bumps are not painful, and the common clinical causes are mainly the following: a. Cyst formation in the elbow joint, which is a more common benign clinical lesion, and smaller cysts can have no obvious painful symptoms, and patients can be closely observed. If the patient’s cyst volume increases progressively, resulting in restricted movement of the elbow joint with local vascular and nerve compression, numbness, swelling and pain in the hand, it is recommended that the patient undergo elbow joint cyst excision, and pay attention to avoid residual cyst wall during surgery to avoid postoperative attacks of cysts, and give local pressure and hemostasis treatment after surgery, and most patients can remove the silk thread in about 12 days. Second, the accumulation of adipose tissue at the elbow joint can form lipoma-like changes. In the absence of obvious pain, patients can closely observe the changes of lipoma. If the lipoma is large enough to cause local painful symptoms, patients are advised to have it surgically removed.