Cysts, normal or not ?

My teenage son, has many cysts. 3 or 4 on his arm pit, about 6 on his leg, 1 just above his waistline, on his left side these are all about the size of small grapes. When he last got a haircut, i nearly flipped, to see one over an inch in length and just under a half inch swell out from his forehead just below the hairline and into the hair. He fought me telling me it was normal, i finally forced him back to his doctor (who i left, and am not at all pleased with). I called again and demanded my son be sent to a specialist, which my son went to, he says this is normal and the cysts can be drained at personal cost as ohip does not cover this. I continually fight with this boy for using pins and draining them constantly himself (all but the one on his head). Is it true, are this many normal ?? Should they continuously refill ?? And what of this huge one on his forehead will it grow ?? I would be greatfull for answers, untill i get this boy to agree to see my Dr. Please help if possibl