im a 16 year old boy and when i play the guitar a lot my right nipple gets all puffy and huge... ive found a lot of stuff online about how, during puberty, boys will often get lumps under their nipples, but i cant find anything about how guitar playing could possibly effect this... i was wondering if any other teenage boys have had something like this happen due to guitar playing... this is a huge problem for me because playing the guitar is a large part of my life, but i am extremely discouraged when it prohibits me from taking my shirt off around other people...
You use one arm more when you play guitar? Maybe the left going up and down the neck of the guitar is more than the right. Try doing a few curls every day and see if that helps. Building the muscles in both arms will make you look better if your in a band or play in public.