A raised bag on the elbow may be caused by a tendon sheath cyst or benign tumors of the body surface such as fibroma or lipoma.
1. Tendon sheath cysts: tendon sheath cysts may be caused by excessive strain, trauma, immune system diseases and other causes of degeneration of the joint capsule, ligaments, tendon sheath connective tissues, long-term joint repetitive activities of the personnel susceptible. Smooth cystic swelling can be seen in the elbow and other joints, and there can be soreness when pressed, and the surface skin can be pushed.
2. Benign tumors: benign tumors such as fibroma, lipoma, etc. can also lead to elbow bumps. Lipoma is soft and generally does not cause pain; fibroma is hard and has no pain.
A raised bump on the elbow can also be caused by other diseases. You can go to the hospital for examination to determine what kind of disease it is and then treat it accordingly, and most of them need to be removed surgically.