There is no current research suggesting earplugs can damage a person's ears. However, wearing earplugs regularly may lead to a buildup of earwax, called impacted earwax, because they can stop wax from exiting through the ear canal. The World Health Organization (WHO) writes that impacted wax can be a cause for hearing loss. A person should not push their earplugs deep into the ear. If a person experiences symptoms of wax buildup, an ear infection, or pain while using their earplugs, they should consider contacting a doctor for advice.