Re: pimples on scalp/hair loss
how old is your friend? I know someone had this problem of pimples on the scalp when she hit puberty. It was the hot weather too that made it worst. That was for 6 months though. She was prescribed some internal medication to get rid of the problem... and was fine soon after.
It has nothing to do with how many times you wash your hair - the most important thing is to keep your scalp/hair clean AT ALL times.