There are many common accompanying symptoms of loss of appetite, such as fever, headache, nausea, vomiting, abdominal pain, diarrhoea, weight loss, anaemia, significant weakness, chills, slowed heart rate, depression and mania are more common. Loss of appetite accompanied by other symptoms should be taken seriously, especially if you have a chronic illness or a history of related illnesses, and if your symptoms are not relieved, it is recommended that you seek medical attention and have your symptoms checked and treated.