Men's Health: Personal Grooming Tips for Men
Reasons for in-growths: A blunt blade, close shaves, dry hair at the time of shaving, or even stretching your skin can cause in-growths.
Prevention for in-growths: Easy, use the right blade for shaving. Use an electric razor to avoid close shave, rinse the blade and wet your hair. Also prevent in-growths by shaving in the direction of the hair.