Ingrown hair occurs when, instead of growing out of the skin naturally, hair grows just under the skin - either inwards (back into the hair follicle) or sideways. In most cases, this condition happens to people who have curly hair. Ingrown hair can be as simple as the hair not emerging from the skin, and it can have complications such as hair follicle infection. The latter is characterized by bumps in the skin and is very itchy.
The treatment for ingrown hair depends largely on whether the hair grows back into the follicle or just under the skin. It also depends on where the ingrown hair can be found. Generally, if the hair is simply under the skin, it is easy to deal with the ingrown hair. For areas which are relatively not sensitive and have this kind of ingrown hair, exfoliation will normally do the trick. The skin covering the ingrown hair will be removed, exposing the hair. Alternatively, you can use tweezers to pick out the ingrown hair. In order to prevent ingrown hair after shaving or waxing a specific area, you can apply topical ointments or creams which can be bought over the counter. This is the most effective way to deal with ingrown hair in the more sensitive areas such as the bikini line.
For ingrown hair that turns inwards and grows back into the hair follicle, exfoliation will not really work. You will have to use tweezers or some similar tool to extract the hair. You can do this on your own, but be careful to soften your skin before doing so. The best way to soften the affected area is to use a warm compress. If you are not careful, extraction will cause scars. Worse, it might lead to infection.