Cachectic fever is a condition characterized by severe weight loss, weakness, and muscle wasting. It is usually accompanied by a persistent fever, and can occur as a result of a wide range of underlying illnesses. There are several synonyms for cachectic fever, including wasting fever, marasmus fever, and fever of unknown origin. Other terms used to describe this condition include cachexia, emaciation, and debilitation. Regardless of the specific terminology used to describe it, cachectic fever is a serious condition that requires prompt medical attention in order to accurately diagnose and treat the underlying illness. Early intervention can help improve outcomes and prevent further complications.