I believe i've come across this spots issue quite often primarily during Summer's but this time i've small spots in batches of 2/3 spread across my back and foot, having whitish/pinkish head and surrounded with brownish / tan layer while diameter differs for each until scratched. It is not itchy until touched. Also, i'm not detected for any allergies priorly. They occur like bugs bite / small pus and reddish, on scratch take this structure I'm also on dose for tinea cruris but these seem nothing like that. Please help. I've attached an image for your reference.