What about ingrowns as a result of body hair removal? I use a phillips bodygroom and occasionally nair clear the area between and around my shoulders, neck and chest. I seem to explode with ingrowns, tend skin or not.
Needless to say, it sucks, and i've narrowed it down to a few causes...
1. Working out
2. Application of pressure, like wearing a backpack, gym back over the shoulder, or leaning back on my bed in front of the xbox 360.
It's odd, I'll shave my johnson and ballsack to a mirror sheen and I get no ingrowns. Shoulders? Tons of them. It's revolting, and I need a solution god dammit!