Pregnancy can cause more serious mammary gland hyperplasia. Mammary gland hyperplasia is a kind of benign breast disease commonly found in women of childbearing age, and its development is mostly caused by excessive and incomplete mammary gland hyperplasia due to the imbalance of estrogen and progesterone ratio, which is manifested as breast swelling and pain with nodular changes of mammary gland hyperplasia, common in bilateral breasts. When the pain is unbearable, the patient should go to a regular hospital for breast surgery or general surgery and take the appropriate oral medication under the guidance of a specialist. During the whole pregnancy period, you should adjust your diet and work and rest habits, mainly light and vitamin-rich food, avoid eating too much fried and spicy stimulating food, go to bed early, get up early, avoid staying up late, and keep your mood happy.