My lover has just been diagnosed with cushing’s syndrome. I am worried but she acts like it is not a problem. Who can tell me what it means?

Too much cortisol. Cushing's syndrome means the body has too much cortisol in it. This can lead to high blood pressure, diabetes, osteoporosis. It can be caused by medications like Prednisone (most common cause - doesn't need treatment, but should try to minimize steroid dose), or by a cortisol producing tumor (needs surgery) or a certain type of pituitary tumor (called cushing's disease - also needs surgery).
Diagnosis ? Cushing syndrome is a problem if the diagnosis is correct. It is very difficult to diagnose cushing you need multiple testes and conformation tests.