Anorexia nervosa may cause a decrease of appetite and excessive desire. Anorexia nervosa is an eating-disorder connected with an unreasonable anxiety about gaining weight and an obsession with food. An individual with anorexia nervosa tries to maintain a weight that's at least 15 percent below normal on her age and height. Anorexia nervosa is most common among teen girls, even though even adults of all genders and teenaged boys can develop this illness. MayoClinic.com says that certain risk factors might raise the chance of developing anorexia nervosa, including youth, female gender, genetics and engagement in specific work, sports or artistic activities.
Diabetes insipidus may cause increased thirst and decreased appetite. Diabetes insipidus is a disorder where a person's kidneys are not capable of preserving water as blood is filtered by them. The amount of water preserved by the kidneys is controlled by anti-diuretic hormone, or ADH. ADH, antidiuretic hormone that is also called, governs the reabsorption of substances in the kidneys' tubules by affecting the permeability of the tissue. According the MedlinePlus web site, you will find two principle kinds of diabetes insipidus: nephrogenic and central to. Central diabetes insipidus may be caused tumor, operation or by brain injuries, infection, whereas particular drugs and elevated calcium levels may cause nephrogenic diabetes insipidus. Double signs and symptoms related to diabetes insipidus include decreased appetite, excessive thirst and increased urine volume.