Eight months baby sleep head sweating a lot may be the normal body metabolism, may also be caused by the lack of vitamin D and calcium, infection, congenital heart disease, etc., according to the cause of targeted treatment. First, physiological factors: infants and young children with high metabolism, head of the hair follicles are more abundant, and the hair is not easy to dissipate heat, sleep will be easy to sweat, if there is a high indoor temperature, quilt is too thick, crying before bedtime, etc. may lead to sweating aggravation. Parents should pay attention to timely wiping sweat and hydration for infants to prevent cold and dehydration, and no special treatment is needed. Second, pathological factors: 1, vitamin D and calcium deficiency: can lead to calcium absorption disorders, but also in the performance of sweating during sleep, at the same time, there will be night terrors, occipital baldness, hair thinning, etc., if accompanied by fontanelle enlargement, square cranium, cranial softness, rib ectopia and other symptoms, need to be alert to vitamin D deficiency rickets. Vitamin D should be supplemented in time, and more sunshine can promote the synthesis of active vitamin D in the body, thus promoting calcium absorption; 2, infections: such as tuberculosis infection, especially those who have not been vaccinated with BCG vaccine, there are often night sweating in bed, low-grade fever, emaciation, loss of appetite, etc., which can be diagnosed by tuberculin test, and anti-tuberculosis treatment can be carried out under the guidance of the doctor, and the medication should be used in an early stage, in conjunction with the whole course of the treatment; 3, congenital heart disease: such as Arterial ductus arteriosus, children with poor growth and development, emaciation, lips and nails bruising, night sweating, etc., can be found under echocardiography. A small number of children can be cured by themselves, most of them will be aggravated with the increase of age, and need timely surgical treatment.