An 'endocrinologist' treats a patients suffering from hormonal disturbance and disorders such as hormonal imbalance like PCO's, hormonal disorder growth, thyroid etc . An Endocrinologist may be seen if one is suffering from adrenal disorders, osteoporosis and bone health, diabetes, weight and metabolism and pituitary disorders etc. They after completing medical school complete a mandatory three to four years residency including study of thyroid imaging and analysis, clinical endocrinology, endocrine tumors and endocrinology and genetics etc. Most endocrinologists are involved in the ongoing research, while some work solely as research physicians the aim is to come up with new ways of treating hormonal imbalances in a better way, which even includes development of new medications.