A small hard lump on the finger may be caused by tendon sheath cysts, insect bite dermatitis, skin boils and other conditions.
1. tendon sheath cysts: tendon sheath cysts are a kind of cystic hyperplasia, mainly occurring in the joints of the fingers, manifested by the appearance of elevated lumps under the skin, so the small hard bumps on the fingers may be tendon sheath cysts.
2. insect bite dermatitis: finger long a small hard lump may be mosquito bites caused by local inflammatory reaction, manifested in the bite of the formation of hard lumps.
4. Skin boils: skin boils are skin infections, which are manifested as hard lumps on the skin surface at the early stage of the disease, and local pressure can cause pain, so a small hard lump on the finger may be a skin boil.
It is recommended that patients with a hard lump on the finger should consult a doctor to find out the specific cause, so as not to delay the treatment.