Endocrinologists can diagnose and treat hormonal problems and the complications that result from them. Hormones regulate metabolism, respiration, growth, reproduction, sensory perception and movement. Hormonal imbalances are the cause of various illnesses.Hormones are chemicals that are controlled by the endocrine glands and help regulate and control much of the body’s activities. Hormones are involved in your growth, mood, reproduction, metabolism and more. If the  hormones are functioning normally, you don’t have to think about them. However, there are more than 50 different hormones that perform complex tasks in the human body, so if you run into problems you need a specialist. An endocrinologist will help you.