Inappetency is a complaint that can develop depending on various causes and it is a common side effect of a lot of diseases. Stomach and intestinal problems are factors of inappetency. Especially scars in the stomach and intestines can cause inappetency. Also, inadequate nutrition and malnutrition can cause inappetency after a while.  Especially, patients with anaemia disease that causes lack of zinc and iron deficiency can become extremely inappetent.

Along with this, some serious cancer types can also cause inappetency. Therefore, although the inappetency may seem like an unimportant problem, the patient must visit a doctor and undergo necessary tests.

Except from the physical and biological causes, some psychological problems can also cause inappetency.