In most cases there is no harm in wearing ear plugs, but care should be taken to choose ergonomic, soft-textured ear plugs. Inappropriate earplugs can lead to sleep difficulties and other disorders, and they can also lead to a decrease in the self-cleaning ability of the external ear canal in both ears, and even some sharp ones can lead to ear canal damage. However, if you wear headphones to listen to music and use sound inappropriately for a long time, it can lead to hidden hearing loss, which must be taken care of. Because hidden hearing loss is usually not felt, the ability to hear in high frequencies is eventually found to be reduced when tested in the hospital. This hearing damage is permanent, so care must be taken that the headphones are not too loud when worn. Hearing damage has less to do with the length of time you wear headphones, the main thing is the decibel of the sound when wearing headphones, very low sound certainly will not cause damage to hearing, but very high decibel such as sirens or explosions, a one-time can lead to permanent loss of hearing. So hearing damage depends on the size of the sound decibel, not on the length of time you wear headphones.