The whitening of the nose hairs at the age of 30 is not necessarily a sign of certain diseases, it may be due to the lack of trace elements and vitamins, or it may be due to long-term anxiety; in addition to this, it may also be the emergence of vitiligo and other conditions. 1. Lack of trace elements: when there is a lack of copper and zinc, it will lead to a decrease in the body’s ability to synthesize melanin, which will lead to the appearance of whitening of the nose hairs. 2. Long-term tension and anxiety, long-term tension and anxiety may also lead to hair follicle melanocyte dysfunction, appearing 30 years old nose hair whitening situation. 3. Vitiligo: Vitiligo belongs to a kind of pigment decolorization disease, may also lead to the situation of the nose hairs become white. The 30-year-old nose hair is not necessarily a sign of a disease, but may also be a trace element deficiency, may also be mental factors, the specific causes should be clear under the guidance of the doctor.