From what i've read, been told by doctors, and from first hand experience....
Gyno at pueberty will go away on it's on (MOST of the time) I got it about 3 differant times at pueberty, and it always went away after about a month.
Gyno as a result from an AS, Will ussually result at first with the nipple getting enlarged (sometimes itchy), then a hard tissue will start to develop under the nipple. This can be very sensitive, and may even cause pain while sleeping on your stomache. As time passes this hard tissue will eventually soften up and start to expand a bit. This is when the "bitch tit" is formed.
So if you see your nipple getting enlarged, itching, or feel any sort of lump under it, don't wait.... DO SOMETHING ABOUT IT! If you've had gyno at pueberty, you're prone to it, and need to be extra carefull.
I didn't know what gyno was until i got it from prohormones and i dropped 3500k on surgery, and am still unhappy. Ill be using armidex with every cycle from now on, no matter how light....