Acute mastitis during lactation is an acute purulent infection caused by bacteria entering the breast through the nipple on the basis of milk stagnation. It often occurs in lactating women who have not yet completed a full month after delivery, especially in primiparous women, and can also occur 2-4 months or even more than 1 year after delivery, or during weaning. Clinically, it is characterized by breast lumps, redness, swelling, heat, pain with fever, chills and fear of cold and other systemic symptoms and easy to occur transmission of the sac. The causative organism is mostly Staphylococcus aureus, and streptococcus is rare. The main cause of the disease is milk stagnation and poor milk discharge. The decision to breastfeed should not be made easily, because breastfeeding is not conducive to the health of the mother and child and does not help the inflammation to subside. Postpartum weakness, low immunity, prolonged breastfeeding, poor personal hygiene of the mother, poor emotions, and incorrect breastfeeding methods can predispose to the development of this disease. Therefore, the active prevention and treatment of this disease is an important part of postpartum breast health care. The manual kneading and grasping of breast drainage treatment for acute mastitis in the stagnant stage, acting directly on the affected area, to pass the depressed Qi, eliminate the swelling of siltation, to achieve the purpose of regulating Qi and dispersing knots, promoting the flow of milk, harmonizing Qi and blood, relieving heat and eliminating inflammation. Smooth milk discharge is the key to successful treatment, which not only relieves the pressure on the milk ducts, but also relieves the pressure on the surrounding blood vessels and lymphatic vessels, which plays a good role in promoting the dissipation of breast lumps. As this method fundamentally removes the cause of the disease, the clinical efficacy is remarkable, and more than 90% of patients can be cured at once. Compared with other therapies, the massage breast drainage technique is simple and easy to implement, easy to accept by patients, with precise efficacy, economical and without side effects, and does not affect the continuation of breastfeeding, is the first choice for the treatment of acute mastitis depression period. It has a positive effect on improving breastfeeding and promoting healthy growth of infants and children.