Ear oil generally refers to oily cerumen, clinically known as thin earwax, this patient compared with normal patients, cerumen is thin, yellowish, oily, not easy to crust into clumps, which is also a normal physiological manifestation of the rare in Asians, but in the West is very common, mainly due to the family genetic factors, and may be related to the patient’s ceruminous glands in the ear canal and the secretion of the sebaceous glands. Generally speaking, as oily cerumen is not easy to be discharged on its own, clinically, patients need to go to the hospital regularly, so that the doctor can use suction to suck out the cerumen, otherwise cerumen blockage of the ear canal is easy to induce ear infections such as otitis externa, otitis media and other related diseases, and it is recommended that patients try to minimize the intake of water into the ear canal in the normal course of the day.