Hi, i am also an 18 year old male and i have a
lump on my left breast between my nipple and
armpit...although there was no pain, there was a slight discomfort. the lump is totally moveable.
I was at the doctors getting a check up on my throat and i mentioned it to my doctor. he checked it out and told me that it was a something on my tissue(cant remember the name), and because it was moveable, i had nothing to worry about - especially at my age.