Drinking boiled water will feel sweet, there may be the following reasons: 1, some water quality is very good, containing some minerals, there may be some sweet substances, so that people feel sweet mouth after drinking water. 2, there may be a dysfunction of the digestive system, resulting in the secretion of various enzymes abnormal. There is an amylase in the saliva, called salivary amylase, if the salivary amylase content increases, it can break down the starch into glucose, and there is a feeling of sweetness in the mouth. 3, Chinese medicine believes that sweetness in the mouth is most often seen in patients with damp heat stagnation in the spleen and stomach, phlegm and fire within, so if you drink boiled water sweetness in the mouth, you can go to the regular hospital of Chinese medicine or large Chinese medicine hospital for examination. By the Chinese medicine physician for tongue or pulse examination, through the look, smell, ask questions, cut, for evidence-based treatment, through the conditioning has improved. And some are just better water quality and do not need any treatment.