There is a small bag at the arm joint

Small lumps on the arm joints may be caused by ganglion cysts in the joints, or they may be caused by lipomas formed by fat accumulation or folliculitis.

1. Ganglion cyst: If you are too tired or catch a cold for a long time, you may develop a ganglion cyst in the arm joint. Ganglion cysts generally cannot disappear on their own and you need to go to a regular hospital's general surgery or orthopedic surgery department for treatment and do an ultrasound examination under the doctor's guidance to check the actual local symptoms. If the ganglion cyst is relatively small and there are no adverse symptoms, generally no special treatment is required. Just do local daily care. If the symptoms of the ganglion cyst are relatively large, surgical treatment is required to remove the cyst. After that, the lesion should be sent to the laboratory for pathological examination to check the nature of the cyst.

2. Lipoma: If the body is too fat, fat will accumulate in the body and form a lipoma. If the lipoma is relatively large, you need to go to the hospital for treatment and let the attending physician observe the actual local symptoms. Surgery can be performed to remove the lipoma. After the operation, the arm joints can return to normal.

3. Folliculitis: Folliculitis is usually caused by endocrine disorders, which lead to abnormal secretion of sebaceous glands and blockage of pores by oil. It can be treated with oral antibiotics.