What causes poor appetite?

Loss of appetite refers to loss of appetite, dislike of food, poor appetite or loss of appetite. It is more common in digestive system diseases such as digestive system tumors, chronic gastritis and hepatitis. And systemic or other systemic diseases, such as severe infection, tuberculosis, uremia, pituitary hypofunction, etc. Loss of appetite is often closely related to mental stress. Severe loss of appetite can lead to malnutrition.