Darker skin after pregnancy is caused by hormonal changes in the body. After a woman is pregnant, the levels of progesterone and estrogen in her body will rise. Estrogen and progesterone can promote melanin cell secretion of melanin, leading to a large increase in melanin in the skin, thus leading to darkening of the skin, which is a normal physiological phenomenon. The phenomenon of skin darkening after pregnancy does not require special treatment, you can eat more antioxidant, vitamin C-rich vegetables and fruits, such as grapes, tomatoes, apples, etc., do not eat spicy stimulating, pickled and other heavy foods, and at the same time, need to pay attention to minimize sun exposure, because ultraviolet rays have the effect of promoting the secretion of melanocytes, thereby aggravating the symptoms of skin darkening.