Hair growth in the ears is mainly seen clinically in the following cases: In the first case, some patients may have a high androgen secretion and grow a particularly large amount of black hair inside the ears, but the patient does not have any discomfort and the examination is very normal in the ear canal and no other manifestations of growing things are found, this is a normal physiological phenomenon and clinically does not require much intervention treatment. If the patient has a particularly large amount of ear hair, which affects the patient’s hearing and ear waxing, he or she can go to the hospital and have the doctor do a partial trimming treatment. In the second case, some patients have nevus nigricans in the ear canal, which clinically manifests as a black neoplasm protruding from the wall of the ear canal. If the disease has been developing for many years, without local breakage or pus flow, and the enlargement is not obvious, clinical observation can be considered. If the local growth is suspected to be particularly rapid, with frequent local erosion and ulceration, frequent bleeding and other changes, surgical removal can be considered if the clinical suspicion is malignant.