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Nasal hair or Nose hair consists of small hairs that are in the nose. Biologically, the hairs act as a filter and keep dust and dirt out of the nasal passages, and strongly stimulate pain nerves if pulled out. It also helps to maintain humidity in the air passages by trapping humidity as one exhales, while evaporation of trapped moisture on the hairs humidifies inhaled air.
Loss of nasal hair due to alopecia areata (a form of hair loss that causes bald spots) has been linked to increased severity of asthma, seasonal allergy and atopic dermatitis (skin irritation caused by hereditary hyper-sensitivity).
See also: Nose-picking
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