Earwax

There are many sweat glands and sebaceous glands in the skin of the external auditory canal. They continuously secrete fluid into the external auditory canal. The amount of these fluids is small, but the viscosity is very large. It can quietly stick dust and skin together. After a period of accumulation, it forms cerumen". When "earwax" accumulates a lot, it can cause symptoms such as ear itch and blockage.