Nausea after eating sweets in the early stages of pregnancy is usually due to changes in hormone levels and early pregnancy reactions. If the symptoms are more serious, we should also consider whether it is caused by gastrointestinal diseases. 1. Early pregnancy reaction: the hormone level of the body will change after pregnancy, nausea, vomiting, acid reflux and other phenomena will easily occur. At the same time, after eating sweets, it is easier to stimulate the secretion of gastric acid, so it is easy to aggravate the symptoms of nausea. 2. Gastrointestinal diseases: If the pregnant woman suffers from stomach diseases, such as chronic gastritis, reflux esophagitis, etc., then the stimulation of sweets, it is easy to nausea and vomiting symptoms. It is generally recommended not to eat too much sweet food during pregnancy, because a large amount of sweet food may lead to high blood sugar concentration, which will adversely affect the development of the fetus. If there is any obvious abnormality, it is recommended to consult a doctor promptly.