Deficiencies or excesses of hormones from the endocrine system can be the cause of mood changes, heat or cold sensitivity, skin changes, menstrual irregularities, bowel changes, weight changes and sexual dysfunction to name a few. Evaluation of thyroid function, adrenal function, ovarian function, testicular function, and pancreatic function can help in your search for reasons for symptoms that have been undiagnosed. Lab testing and panels are available to help you with your search for undiagnosed symptoms.