Itchy and painful mosquito bites on the finger may be insect bite dermatitis, which can be treated with topical and systemic medications. Insect bite dermatitis is an allergic reaction to insect bites, manifested by redness, erythema and blisters on the skin at the site of the bite, accompanied by itching and pain. 1. Local medication: local topical glycerine lotion, or local application of antipruritic cream, such as cool oil, etc., can also be used externally with glucocorticoid creams, such as halomethasone cream, mometasone furoate cream, etc., if secondary bacterial infections, can be applied locally antibiotic ointment, such as mupirocin, clindamycin ointment and other ointments. 2. Systemic medication: severe symptoms can be combined with oral medications, including antihistamines, such as loratadine tablets, cetirizine hydrochloride tablets, etc., secondary bacterial infections can be oral antibiotics, such as amoxicillin capsules, cefixime capsules, etc., if the lesions are widely distributed and the allergic reaction is serious, oral glucocorticosteroid drugs, such as prednisone tablets, dexamethasone tablets, etc.. All of the above drugs have adverse reactions, and are recommended to be used under the guidance of a doctor. Mosquito bites after the finger itchy and painful, it is recommended not to scratch the affected area to avoid wound infection, if the symptoms are serious, it is recommended to go to the hospital in time for treatment.