Finding an ingrown hair a few days after shaving, waxing or epilating is frustrating. It’s caused by hair curling into and getting trapped underneath the skin, and it can be itchy and painful.

For the past five years I've been trying (with varying levels of success) to shave my head and keep my scalp belmish-free. I have hair of moderate coarseness that is slightly wavy. I get ingrown hairs ...