What is the cause of black hair on the newborn's ears?

Newborns often have more or less hair on their bodies, which does not require special treatment. These are all lanugo, and the lanugo will eventually fall off slowly on its own. If the mother shaves the baby's hair manually out of ignorance at this time, it may cause inflammation of the baby's hair follicles and lead to infection. However, if the hair has not fallen out after six months, you should go to the hospital for a check-up as inflammation may have occurred.

Don't worry, this is vellus hair, which is common in newborns, especially premature babies. It is recommended not to worry too much, things will gradually return to normal, and pay attention to the feeding and vaccination of the newborn.

Newborns will have hair on the back of their ears and shoulders. This is normal and will go away as they grow older. It’s okay. It’s baby hair and you won’t see it when the baby grows older. Most babies have hair when they are just born, so don’t worry about it.

As the saying goes, hair is still hair. Newborn babies have more lanugo, which tends to grow on the back of their hands and buttocks. The lanugo on the ears is distributed around the auricle. Some are long in color but not obvious, while some are very black and obvious. Who says the hair will fall off slowly as the baby grows up? Generally, it will fall off naturally after a few weeks, and almost all of it will fall off between March and June. There is no need to worry or shave it off intentionally, as this will only damage the child's hair follicles.

If the black hair on your baby's ears is very long and there is a lot of it, and it has not gone away after 6 months, then it is very likely to be external auditory canal hypertrichosis. External auditory canal hypertrichosis is a Y-linked genetic symptom currently recognized by scholars. This disease is more common among Indians, and has also been found in a small number of Caucasians, Australian aborigines, Japanese, and Nigerians. The pathogenic genes of this type of genetic disease are located on the Y chromosome. There is no corresponding gene on the X chromosome, so these genes can only be passed on with the Y chromosome, from father to son, from son to grandson, and so on from generation to generation. Therefore, it is called "all male inheritance".

There is fluffy brown hair in the external auditory canal at birth, which turns black after the age of six. During puberty, longer black hard hairs appear in the external auditory canal, with a length of about 2 mm to more than 20 mm. All cases of external auditory canal hypertrichosis are bilateral and have obvious symmetry. Hairy areas are often found at the opening of the external auditory canal, the helix, and the tragus. It is only seen on the front of the auricle and has never been seen growing on the back of the auricle. The ear hair can be up to 4.5 cm long, some are curly, and some are accompanied by beards.