Earplugs can cause localized pressure, blockage, may cause inflammation of the external ear canal, hearing impairment or allergies and other diseases, generally not recommended to sleep with earplugs. 1. Inflammation of the external auditory canal: If you sleep with earplugs for a long time, local pressure and poor blood circulation may cause inflammation of the external auditory canal. 2. Hearing damage: such as airplanes or the surrounding environment when the noise is relatively large noise can be brought to sleep with earplugs, a short period of time is possible. If the long-term use of sleep aids is not desirable, long time will affect the hearing. 3. Allergy: earplugs are made of different materials, if you use poor-quality earplugs, will irritate the skin, the skin of the ear canal to cause direct damage, resulting in allergies and other adverse reactions. Try not to wear earplugs when you sleep, and if there is any ear discomfort during the wearing process, it is recommended to go to the hospital in time.