Cushing's Disease is a condition caused by an excess of the hormone cortisol in the body. This usually happens when a small tumor in the pituitary gland produces too much adrenocorticotropic hormone (ACTH), which in turn stimulates the adrenal glands to produce more cortisol. Symptoms can include weight gain, especially around the abdomen and face, high blood pressure, and mood changes. Diagnosis often involves blood tests, urine tests, and imaging studies to identify the source of the hormone imbalance. Treatment may include surgery to remove the tumor, medication to control cortisol levels, or radiation therapy. Early diagnosis and management are crucial for improving health outcomes.