sweat stain? next time wait until all your sweat gone, body cool down only go bath? it happened to me once now everything are pretty gone.

it used to sting me instead of itchy, and that time i was so worried and scared sh!t coz I very scared of getting skin disease.... coz everybody will have to leave me from a distance at that time when i was young I got quite a serious skin disease coz our room dont have ceiling fan, dont have air con, small room with only 1 small stationary fan. and I sweat alot. That was the serious one. But when i grew up I got sweat stain again forgotten from where.

anyway, let your body cool down first and bath, thats the best to me.