The symptoms of reduced appetite, nausea and vomiting may be caused by phytodysfunction, gastroenteritis, gastroesophageal reflux, pharyngitis, early pregnancy, etc. You can consult a gastroenterologist to clarify the cause and carry out relevant treatment. 1. Phytodysfunction: long-term mental tension, insomnia, excessive psychological stress, anger and mental stimulation cause phytodysfunction, which affects the gastrointestinal nerves and causes digestive system Disorders, causing nausea and reduced appetite. Generally by adjusting the diet structure, maintain a good state of mind, avoid strain and other measures can alleviate symptoms; 2, gastroenteritis: unclean diet, overeating, eating too cold, spicy stimulating food can lead to the occurrence of acute gastroenteritis, causing nausea, vomiting, the application of omeprazole, ranitidine to protect the gastric mucosa, reduce gastrointestinal stimulation, bifidobacteria to improve intestinal flora, thereby promoting gastrointestinal dynamics, improve symptoms 3, gastroesophageal reflux: when the anti-reflux mechanism is impaired, reflux stimulates the esophagus causing regurgitation and nausea, which leads to reduced appetite and not wanting to eat, usually apply omeprazole, domperidone and other drugs to inhibit gastric acid secretion, improve gastric emptying disorders, and avoid food reflux; 4, pharyngitis: the pharynx produces discomfort and even causes pain, leading to difficulty in swallowing food, which reduces appetite, while the irritation caused by pharyngitis Cough, may cause nausea, vomiting, furacilin solution can be used to gargle, keep the back wall of the throat clean, and then through more water, adjust the diet structure can reduce discomfort; 5, early pregnancy: women of childbearing age in early pregnancy due to changes in the body hormone level caused by early pregnancy reaction, manifested as bloating, nausea, reduced appetite and other symptoms, belongs to the normal physiological phenomenon, can be self-relieved, to be diagnosed through ultrasound examination in a timely manner. You should not use drugs blindly to avoid affecting the growth and development of the fetus.