worried about my son

[amy2006]

hello everyone my son has complaining to me lately that he thinks he has a problem going through puberty. hes 15 and he told me that he doesnt have any hair under his armpits he said that he hit puberty at 13 but he says that he stopped growing he was talking to our doctor on the phone and he explained everything that was wrong. and then the doctor told me what he told the doctor. the doctor told me that he said that he hit puberty at 13 he grew some hair on his genitals and his voiced changed and he told the doctor that he got taller and gained some weight but hes 15 now and he still isnt finished he told the doctor that he has no armpit hair and he told the doctor that his penis and testicles arent fully grown. the doctor said over the phone that he proly has low testosterone. but why would my son have low testosterone. for about a year and a half he was fine then all of a sudden his testosterone gets low how does that happen. how could a perfectly healthy kid develope low testosterone. does testosterone make armpit hair grow. my son says that he never sweats at all maybe he has inactive sweat glands and maybe thats why he has no armpit hair. well anyways please give me your opinions.

[who_dis]

All we can do is tell you to research it.  Here's a start.

http://www.urologychannel.com/testosteronedeficiency/causes.shtml