Small bumps on the hand a touch of pain may be the manifestation of the hand tendon sheath cysts, there may also be insect bites caused by insect bite dermatitis, need to be specifically analyzed. 1. Hand tendon sheath cysts: this is a cystic swelling in the tendon sheath of the joints, is caused by degeneration of connective tissue, preferably in the wrist, back of the foot, etc., is due to injuries, strain or long-term repetitive joint activities, etc., the greater the tension of the cysts, the pain is more pronounced, if you have this symptom to be treated in a timely manner. 2. Insect bite dermatitis: insects such as fleas, lice and other bites lead to skin allergic reactions, preferably in the waist, buttocks, limbs and other exposed areas, the bite site will appear red spots, blisters, etc., the need for symptomatic and anti-allergy treatment. The hand bumps a touch of pain may also be a pathogen infection, common warts and other reasons, it is recommended to go to the hospital in a timely manner, improve the examination in the doctor’s guidance for targeted treatment.