1 year and 3 months baby drink more water situation, may and hot weather, fever and cold, diabetes and other factors related. 1. hot weather: this is the cause of the baby drink more water, because in the case of excessive heat, there will be the phenomenon of the baby sweating more, because of the loss of water and thus increase the dry mouth, so there will be the symptom of drinking more water, is a normal phenomenon. 2. Fever and cold: 1 year 3 months of the baby is still relatively small, may be due to low immunity, and thus very susceptible to the influence of external factors, in the case of cold, it is easy to cause fever and cold, during the fever will be due to the evaporation of water in the body, so there will be water shortages, at this time there will be a lot of water to drink the performance. 3. diabetes: 1 year old 3 months baby drink more water, do not rule out the possibility of diabetes, diabetes itself has more drinking, more urination, more food phenomenon, mainly because of the body’s utilization of sugar decreases, so it will make the blood glucose level increase, the osmotic pressure in the blood increased significantly, stimulate the nerve center and the symptom of drinking more water. 1 year old 3 months baby drink more water may also exist other reasons, need to cooperate with the doctor for examination to be clear.