Mosquito bites turning into white head, what do i do?

Infected: Warm compress, topical antibiotic, have it looked at if it does not get better in a few days.

Mosquito bite.: Right after being bitten by a mosquito you may develop a soft white bump than later transitions into a hard, brown (reddish-brown) or a blister or bruising. There may be itching & swelling around the lesion. If the area develops red streaking, become significantly painful or has purulent drainage - seek medical attention.