This is a very common problem for a lot of men. We have a few tips: trim the hair with a larger clipper so you’re not getting so close to the skin. Problems arise when you nick the skin because it heals over the hair follicle, resulting in ingrown hairs, butt acne, etc. You can also use a cleanser designed to treat acne that contains salicylic acid. After shaving, lather the cleanser on your butt and leave it on for 3 minutes. This will help a lot in preventing ingrown hairs and butt acne that results from clogged hair follicles. Finally, laser hair removal is a great option to remove unwanted hair. It’s quick and cost/time effective.