Cushing's syndrome usually gets better with treatment, although it might take a long time to recover completely. Treatment depends on what's causing it. Speak to your doctor about the benefits and risks of the different treatment options. -If it's caused by taking steroids: your steroid dose will be gradually reduced or stopped -If it's caused by a tumour, treatment may include: 1-Surgery to remove the tumour. 2-Radiotherapy to destroy the tumour. 3-Medicines to reduce the effect of cortisol on your body.