Dry ears do not turn into oily ears. First, we need to understand the formation of cerumen in the external ear canal. The epithelium of the external ear canal has hair follicles, sebaceous glands, and cerumen glands, and the substances secreted by the cerumen and sebaceous glands, together with the epithelial cells shed, make up the cerumen in the external ear canal. Most people have dry cerumen, while some people have oily earwax, also called dilute earwax. It is often determined by genetics and is racially inherited, so dry earwax is dry earwax and cannot become thin earwax. However, if the earwax was originally dry and suddenly becomes thin, it may be due to inflammation of the external ear canal or water in the external ear canal that has caused the earwax to soak. It is best to go to the hospital for examination to rule out the possibility of inflammation of the external ear canal and otitis media.