One and a half year old baby sweating with metabolism, activity, temperature and other physiological factors, as well as calcium deficiency, endocrine diseases and other pathological factors. 1. physiological factors: one and a half year old baby metabolism is more vigorous, high basal metabolic rate or more active activity is relatively large, as well as the environment temperature and other conditions, may lead to one and a half year old baby sweating. 2. Pathological factors: some diseases can also lead to one and a half years old baby sweating, common diseases are calcium deficiency, hyperthyroidism and other endocrine diseases. One and a half year old baby sweating more may also have other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.