The mouth can feel a variety of taste sensations, oral sweetness is a common phenomenon, generally speaking, it is a normal situation, mostly related to eating too much food containing sugar, eating food containing sugar will make the mouth sugar decomposition, accumulation, and therefore sweet feeling. Generally through drinking more water, rinsing more mouth, adjusting the diet structure in the short term can be restored to normal. Long-term sweetness in the mouth is often due to spleen deficiency and taste nerve damage and other diseases, you need to go to the hospital early to clarify the cause.