Ingrown hair are a common condition in which a hair gets curl back or grows laterally into your skin. The issue is most common among those who have curly hair. Sometimes it may be followed by an infection within the hair follicle or due to razor bumps, which often differ in size. Although ingrown hair most often shows up in places where the skin is shaved or waxed (legs, beard or pubic area), it could possibly appear anywhere.
It can be triggered by anything that can cause the hair to be broken off with a sharp tip, causing ingrown hairs. Ingrown hairs may also be started due to insufficient natural exfoliation within the skin.