Loss of appetite means not being hungry and feeling no desire to eat. This can lead to weight loss and increasing weakness.
Loss of appetite is caused by the illness and/or the treatment. Various factors can make loss of appetite worse, for example, changes in your sense of taste, inflammation of the lining of the mouth, nausea, vomiting, pain or constipation. Depression or sadness can also affect your appetite.
The loss of appetite is often short-lived and can be alleviated with various measures.