Darkening of the skin after radiotherapy can be recovered. After radiation therapy, there is some damage to the skin, which can cause skin redness, followed by pigmentation, pigmentation is manifested as black skin, but this performance is benign, as long as the dry damage do not use hot water, do not go to the sun, or do not rub or rub hard during washing and bathing, the skin can recover, and generally the skin can gradually return to normal after radiation therapy about 1-3 months. If the skin is darkened, you can use skin protector to make the skin repair faster. Also be careful not to let the skin become infected, that is, the skin breaks down, in the case of darkening. If the skin breaks out and becomes infected, you need to give topical antibiotic treatment, such as topical Bactrim or erythromycin ointment. If the skin is simply blackened, a mucosal protector can be used.