Nose hairs that are too long may be caused by heredity, or related to untimely trimming, or it may be caused by the high secretion of androgen in the body. Nose hair is a special kind of hair that grows inside the nasal cavity and is the first line of defense for the respiratory system. Nasal hairs can block the dust and bacteria in the air, and can also maintain the temperature and humidity of the nasal mucosa and protect the olfactory nerve from damage. Too long nose hairs may be caused by congenital heredity, and the hairs themselves are more vigorous. If you trim the nose hair frequently, it will stimulate the growth of nose hair and make the growth of nose hair faster, if not trimmed in time, it may lead to too long nose hair. Hair growth and androgen have a certain relationship, when the patient’s body androgen secretion exuberant, may lead to exuberant hair growth, thus appearing nose hair too long. In general, too long nose hair is a normal physiological phenomenon, if there is no other discomfort may not intervene in the treatment. Avoid plucking the nose hairs directly to avoid damage to the hair follicles causing nasal infections.