Cerumen (English cerumen / səˈruːmɛn /) Serum in medical terms. Yellowish discharge from the ear canal of humans and other mammals. Serumen is a mixed secretion of altered apocrine sweat glands and sebaceous glands in the outer third of the ear canal. Although commonly referred to as earwax, it has an important role to play. It maintains the health of the ear canal and protects the ear from bacteria , fungi , insects and water. However, its presence in excess can block the eardrum and create pressure on the eardrum and cause hearing loss. It sticks out of the ear in a sticky state. The movement of the jaw when chewing food or while talking is the reason why this khail moves outwards. This process is aided by the hair follicles in the outer ear canal. This hair is blown out like a broom to get rid of earwax. Under normal circumstances, it is not necessary to clean the soft glue of the ear later as it comes out automatically. Moreover, it does not cause any problem. However, this itch often becomes hard and then the problem occurs. Especially those whose skin is less oily, the earwax may become hard. Those who have dandruff on their head also get a lot of itch in their ears. However, due to dandruff, there is a difference between the accumulated khail and the deposited khail in the normal process. A slight or excessive hardening of the ear causes pain in the ear. Some people's ears are full but there is no pain. In these cases, when water enters the ear due to bathing by dipping in water , the khail absorbs that water. Absorbing water, the khail swells and creates pressure on the external ear canal. This also causes pain in the ears.