The causes of subcutaneous bulging lumps in the middle finger may be tendon sheath cysts, lipomas, osteochondromas and so on.
1. Tendon sheath cyst: a cystic swelling in the tendon sheath of the finger joint due to trauma, strain injury, etc., with symptoms of soreness and swelling as well as pressure and pain.
2. Lipoma: due to local inflammation or abnormal lipid metabolism, the normal fat cells under the skin produce excessive hyperplasia and form a mass-like structure, which is a kind of common benign soft tissue tumor.
3. Osteochondroma: a bony protuberance formed by heterogeneous proliferation of chondrocytes on the middle finger, mostly occurring in adolescents.
Middle finger subcutaneous bulging lumps may also have other reasons, it is recommended to go to the hospital in time to find out the cause of the targeted treatment.