Earplugs are usually built-in and need to be placed in the ear canal. Sleeping with earplugs for a long time may wear out or inflame the ear canal. Earplugs may rub and irritate the skin of the outer ear canal, and sleeping with earplugs for a long period of time may lead to skin damage. Additionally, earplugs may cause the skin of the outer ear canal to remain in a confined space for long periods of time, which can lead to poor ventilation and a tendency to secondary bacterial infections when the skin is damaged. Wearing earplugs to bed for long periods of time may lead to a greater likelihood of otitis externa, eczema of the external ear canal, and may even cause boils of the external ear canal. Infection of the ear canal will produce a series of reactions, for example, otitis externa patients often clinically manifested as itching, running water, redness, swelling, pain, hearing loss and other uncomfortable symptoms. It is not recommended to wear earplugs to bed for a long time. If the sleeping environment is noisy, you can choose ear muffs that are less irritating to the skin of the external ear canal.