Sudden decrease of milk in three months is usually related to emotional abnormality, excessive fatigue and milk stagnation, which can be remedied by general treatment and medication according to the cause. 1. Emotional abnormalities: too much anxiety, tension, worry, anger, etc. during breastfeeding may lead to a sudden decrease in milk. You need to regulate your emotions and maintain a relaxed and happy state, and when your emotions are relaxed, the amount of milk will gradually increase. 2. Excessive fatigue: If you are overworked, don’t pay attention to rest, or stay up late for a long time during the breastfeeding period, it will also affect the amount of milk and lead to a decrease in milk. At present, you need to pay attention to rest and ensure enough sleep, when the body is improved, it can also restore the normal amount of milk. 3. Breast milk stagnation: For breast milk stagnation caused by mastitis, oral cephalosporin, penicillin anti-inflammatory; and about breast milk stagnation caused by reduced breastfeeding, can be used to suck milk, or insist on letting the child suck milk. Three months of milk suddenly become less, you can also use massage techniques for lactation, so that the mammary ducts to return to normal secretion, but to operate under the guidance of a formal physician, the specific medication program should also be strictly in accordance with the doctor’s instructions.