Anorexia nervosa might cause a decrease of hunger and extreme desire. An individual with anorexia nervosa attempts to preserve a weight that is at least 15 percent below normal on her age and height.
Anorexia nervosa is most common among teenage girls, although even adults of all sexes and adolescent boys can develop this illness. MayoClinic.com says that specific risk factors might raise the
chance of developing anorexia nervosa, including youth, female gender, genetic science and involvement in particular work, sports or artistic activities.
Diabetes insipidus may cause decreased appetite and increased desire. Diabetes insipidus is a condition in which someone's kidneys are not capable of preserving water as they filter blood. The
quantity of water conserved by the kidneys is controlled by anti diuretic hormone, or ADH. ADH, also called vasopressin, regulates molecules in the kidneys' tubules' reabsorption by changing the
tissue's permeability. According to the MedlinePlus web site, you will find only two principle kinds of diabetes insipidus: key and nephrogenic. Mutable signs and symptoms associated with diabetes
insipidus include decreased appetite, extreme thirst and increased urine volume.