weird rash, spreading over face and neck...
yesterday i noticed a few lumps (only tiny, like a rash) behind my ears. throughout the day, it spread to all over my ears and down my neck. i didn't put anything on it and thought it would be gone by the morning.
however, it is now spreading across my face and eyelids.
it is not really itchy, but slightly red.
i cannot think of anything which may have caused it except from that i went in a friend's hot tub on friday evening. i use no skin creams and haven't been in any unusual circumstances other than the hot tub.
what should i do? could it be anything serious?