Ingrowing hair, otherwise called razor bumps, is often caused by thick coarse hair becoming coiled underneath the skin. This causes blockage and inflammation and redness or dark marks called post inflammatory hyper-pigmentation. It can occur on any hair bearing area. The dermatological term for this is Pseudofolliculitis Barbae and oftem more common in Indian and Afro-carribean skin due to the type of hair.
Ingrowing hair can improved with exfoliating of mild but gold standard ( Ideal treatment) is the use of suitable and safe laser to remove the hair or make it finer.