A bout of acute mastitis may be a symptom caused by infection of the mammary gland by bacteria, virus, etc. It may also be a condition caused by the accumulation of milk during breastfeeding, which needs to be treated in time. 1. Infection: When the mammary gland is invaded by pathogenic microorganisms such as bacteria and viruses, it leads to acute purulent inflammation of the breast, and there may also be a lump, which can be treated with anti-infective and anti-viral drugs. 2. Milk accumulation: when the mother’s milk can not be discharged in time, it may cause bacterial growth, resulting in a bout of pain. The child should be allowed to use the correct breastfeeding position, alternating between the two breasts to prevent milk buildup. When a patient suffers from mastitis, he or she should consult a doctor in time and use medication under the doctor’s guidance. At the same time, mastitis patients should eat a light diet in their daily life, avoid spicy and stimulating foods, and actively exercise to improve their immunity.