Any illness can adversely affect a previously hearty appetite.
If the disease is curable, the appetite will return when the disease is cured. Loss of appetite can cause unintentional weight loss . This list is not all inclusive, and the causes are not presented in order of likelihood. The causes of this symptom can include unlikely diseases and medications. Furthermore, the causes may vary based on age and gender of the affected person, as well as on the specific characteristics of the symptom such as time course, aggravating factors, relieving factors, and associated complaints.