Hepatitis B patients who are normal or getting thinner may be caused by mental factors, chronic gastritis, hyperthyroidism, diabetes and other factors. 1. Mental factors: excessive mental tension, anxiety, psychological pressure leads to loss of appetite and other symptoms, resulting in more and more thin. 2. Chronic gastritis: chronic inflammation of the gastric mucosa, weaker digestive capacity affects the digestion and absorption of food, resulting in malnutrition leading to more and more thin. 3. Hyperthyroidism: excessive secretion of thyroxine and rapid consumption of thyroid hormone, manifested in hunger, body thinning, excessive sweating, bulging eyes and other symptoms. 4. Diabetes mellitus: high blood glucose will also be manifested as more and more thin, drinking, urinating, hunger and other symptoms. It is recommended to consult a doctor in time to identify the cause of the disease and treat it under the guidance of a physician.