Ingrown hairs grown through the side of the follicle and lie just beneath the skin’s surface. Ingrown hairs are usually caused by tweezing or waxing, then the hair breaks at the weakest point just below the surface of the skin. this can distort the hair, especially if it is pulled against its direction of growth. the hair will then grow under the surface of the skin rather than up and out of the hair follicle. A pimple-like inflammation results that is uncomfortable to the patron, especially when it occurs on the inner thigh, the neck or the underarm.
Men with heavy beards can have this problem. when they shave close, the hair pulls back into the hair follicle, and sometimes its direction of growth is altered, causing ingrown hairs. ~Modern Electrology: Excess Hair, Its Causes and Treatments by Fino Gior
Patrons who are prone to ingrown hairs should stop temporary methods of hair removal, i.e., tweezing, threading, sugaring or waxing and consider electrology for permanent results.