Steroid ointments have different strengths- they can be very weak, or very strong. Hardly any steroid cream actually gets into the system so the side effects are usually only in the skin. If a very strong steroid ointment is used on the face, armpits or groin for a very long time- you can get "thinning of the skin" but this is VERY VERY rare. If used properly, steroid ointments will not cause any long-term skin problems. If very bad eczema is left untreated, it can scar.