The medical term for hyperpituitarism is pituitary adenoma. This is a tumor that affects the pituitary gland, which is a small gland situated at the base of the brain that produces hormones. Hyperpituitarism is a condition where the pituitary gland is over-producing hormones, resulting in an abnormally high level of hormones in the body. Symptoms of hyperpituitarism include excessive thirst, frequent urination, excessive sweating, headaches, mood swings, and vision changes. Other serious symptoms can include high blood pressure, weight gain, and infertility. Treatment for hyperpituitarism may involve medications to reduce the levels of hormones in the body, radiation therapy, or surgery to remove the tumor.