My son 6 has had about 60 spots spreading first from his arm and then onto his torso. We tried apple cider vinegar, bath salts, special creams, diluted tea tree oil which all had no effect and each day there seemed to be more, spreading down his leg. At that point he started to find them getting very itchy and took to scratching them, despite my telling him not to. He then one day showed me that he was systematically picking the core out of each one and the ones he had done had bled a little and were healing. I realised then that they were actually clearing up and some of the smaller ones on his legs had gone by themselves. It is as if the act of attacking them had lead to his immune systrm kicking in. Just also of interest is that during the time he continued to share a bath daily with his sister and never caught them.