Is it safe to pierce if I sleep on my side or stomach?

Yes and no! For lobe piercings often some degree of pressure will be placed on one or both ears during sleeping and usually will not cause pain or damage to the new piercings. After a baby's piercing, the mother can nurse the baby immediately. Cartilage piercings, on the other hand, will definitely cause pain if direct pressure is applied and the piercing itself could migrate from the pressure. Anyone getting a cartilage piercing is encouraged to not place any pressure at all on the ear which is why I never encourage getting cartilage on both ears during a single appointment. A donut type pillow can be extremely useful for the healing stages of cartilage piercings.