Hair on the ears is mainly divided into the following cases: 1. Newborn children have low immunity and poor insulation, and grow a lot of fetal hair on their ears, which is a defense against viruses, generally less than a month, and more than three months may be needed before they slowly fall off. This is a normal phenomenon for a newborn child, so parents should not think that it is a deformity or mutation. 2. It is seen in adults and may be related to their usual eating habits, like drinking drinks or staying up too late, fire, endocrine disorders or too much androgen secretion, or the surface of the ears are often coated with hormonal drugs, resulting in the surface of the ears being prone to hair growth, which is generally not a big problem. It can be observed and no special treatment is needed, but patients must pay attention to their lifestyle and usually develop healthy eating habits and regular living habits to avoid staying up late and getting on fire, etc. 3. Some patients have something growing on their ears, such as sebaceous glands or dark pigmented nevi on the ears, and there may be hair-like changes on the surface, this kind of long hair is usually single and sparse and will not be a large area, which can be clinically Observe, and if abnormal changes are detected and found to increase in size, surgical removal can also be considered.