Please explain about an abnormal condition called cushing's disease.

Pituitary growth. Cushing's disease is a condition where the pituitary (tumor) is producing too much acth (adrenalcorticotropic hormone). This hormone stimulates your adrenal glands to produce extra cortisol (stress hormone) which in excess can cause a lot of metabolic problems.
Elevated Cortisol. Cushing's disease is a problem where your cortisol is elevated. Cortisol is a stress hormone that can raise your blood sugar and help you with metabolism. With cushings, you can have diabetes, obesity, a poor immune system and decreased bone density, among other symptoms. You doctor will help make the diagnosis with blood and urine tests and then determine why you developed cushings.