If you are in good health you may not need any special tests or X-rays. Often a simple blood count is done to check you are not anemic. If you suffer from a serious illness, such as diabetes, your doctor may order tests or suggest you see your treating physician. If you are going to have a general anesthetic, the anesthesiologist may order special tests to prepare for the anesthetic. Most plastic surgeons take photographs before and after surgery.
Most people with gynecomastia have idiopathic gynecomastia and there is no cause found. Sometimes if indicated your doctor may order other tests, such as for the liver or hormones.