Painful pressure on the lateral aspect of the breast in the axilla is usually associated with impaired lymphatic return in the axilla caused by cystic hyperplasia of the breast, and in severe cases, reactive lymphadenitis. Cystic breast hyperplasia is the most common benign breast disease in young and middle-aged women. So far, the exact cause of the disease is not clear, but clinical research suggests that it may be related to an imbalance of estrogen, progesterone, and prolactin in the body. Typical clinical manifestations include breast swelling and pain during menstruation, or even lump formation, with symptoms resolving or disappearing after the menstrual cycle. For cystic hyperplasia of the breast, the lymphatic return in the axilla is usually blocked, leading to impaired lymphatic return in the axilla, resulting in swollen, distended and painful axillary lymph nodes. Patients need to undergo ultrasound examination to make a clear diagnosis. For patients with a clear diagnosis of cystic hyperplasia of the breast, conservative treatment is used, and relief of clinical symptoms can usually be obtained with little or no surgical treatment. Treatment measures mainly include diet, avoid eating too greasy, spicy, stimulating food, as well as relaxation, avoid overwork, and in severe cases, you can take Chinese medicines, such as Easy Pill and Breast Fetish Elimination, to get symptomatic relief.