Hearing loss is a condition where a person has difficulty hearing sounds. It can happen gradually over time or suddenly due to an injury or illness. Many people experience hearing loss as they age, but it can also affect children and young adults. Common causes include exposure to loud noises, ear infections, and certain medications. There are different types of hearing loss, such as conductive hearing loss, which occurs when sound cannot travel through the outer or middle ear, and sensorineural hearing loss, which happens when there is damage to the inner ear or auditory nerve. Treatment options include hearing aids and cochlear implants.