How do ear stones form?

Cerumen can secrete viscous liquid, and when these secretions dry, they will form

crusts, namely cerumen. A

small amount of cerumen has the function of protecting the skin of the external ear canal and preventing dust or foreign matter from entering the internal ear canal. However, due to various reasons, cerumen accumulates in large quantities and cannot be discharged in time. When it is long, it will oxidize into a hard stone-like substance, which is mistaken for an earstone.