dry and thin skin; unexplained hair loss; heart palpitations; dyspepsia; constipation;
hypoglycemia (low blood sugar); food allergies, high frequency of the flu or infections, lightheadedness upon standing, diabetes, unwanted facial or body hair, sexual dysfunction, weakness, nausea, paleness, altered consciousness, seizures, and on and on.
Simple to diagnose (go to an endocrinologist) and simple to treat IF you go to a doctor with experience with these issues.