what your friend has is natural, its scar tissue. you decide how much you get. The more you fuk with your piercing before it heals the more scar tissue youll have.
A few tips I wish someone had told me:
DONT move/tweek/play/mess with it until it heals. (4 to 6 mths or more)
Put a bandaid on it at night or wear a shirt to bed, UNTIL IT HEALS. (this is where I fuked up, I tore the left side of my piercing while sleeping, took mine at least 8 mths to heal because I kept hurtn myself while sleeping, once while doing incline dumbell presses - now that hurt!)
Other than that just follow the insturctions given to you by your piercer.