Cold chills and headaches during breastfeeding for two months may be caused by upper respiratory tract infections, acute mastitis, endometritis and other reasons. 1. Upper respiratory tract infections: the resistance of breastfeeding mothers decreases due to fatigue, cold and other reasons, and they are infected with parainfluenza viruses, coxsackie viruses, etc., which cause upper respiratory tract infections and lead to fever and headache. Before the fever, there are many symptoms such as chills. 2. Acute mastitis: Acute mastitis is caused by milk stagnation and cracked nipples during breastfeeding and can be characterized by breast pain, chills and high fever. Headache can be caused by spasm of blood vessels in the head. 3. endometritis: two months after delivery, due to labor injury, start sex too early easy bacteria invade the uterine lining, resulting in endometritis. It causes lower abdominal pain, fever and abnormal vaginal discharge. Chills can occur before the fever, and headache can occur after the fever. Breastfeeding two months chills headache should be timely consultation, under the guidance of the doctor to identify the causes, give targeted treatment.