What should a tired, anorexic child take?

The diagnosis of anorexia in a child is mainly based on the symptomatology of the disease combined with a number of other tests such as blood tests, stool tests, urine,…

After accurately determining the cause of anorexia, the doctor can offer the appropriate treatment solution, thereby improving the condition, increasing appetite.

My daughter is 3.5 years old, weighs almost 15 kg, is often tired, lethargic, anorexic.