Pregnant thirteen weeks to the evening after eating a meal, dry heaving, dry throat, may be related to hormonal changes in the body, food is not easy to digest, pharyngitis and other reasons. 1. Hormonal changes in the body: early pregnancy due to the human chorionic gonadotropin rise faster, may cause nausea, vomiting and other early pregnancy reaction, there will be dry heaving after meals, dry throat, but the early pregnancy reaction is usually twelve weeks after pregnancy will gradually ease, thirteen weeks of pregnancy if the symptoms instead of aggravation, there may be other causes. 2. Food is not easy to digest: If pregnant women consume food that is not easily digested or absorbed at night, they may experience stomach discomfort, which may lead to dry heaving and dry throat. 3. Pharyngitis: If a pregnant woman has chronic pharyngitis, coupled with spicy and stimulating food, it may also cause throat discomfort, dry heaving and other symptoms. It is recommended that pregnant women should pay attention to dietary balance, eat a light diet, and eat more easily digested and easily absorbed food. If the symptoms of dry heaving after meals are more serious, it is recommended to consult a doctor in time, under the guidance of the doctor, improve the relevant examination, clarify the cause of the disease, and timely treatment.