<P> In addition to cases caused by heredity, physical injury, the transverse nasal crease is common in children and adults with chronic nasal allergies . Allergy sufferers often use their hands to remove mucus from a runny nose or rub an itchy nose . As the hand slides upward, the tip of the nose is pressed up, thus creating the crease . </P> <P> On most people, the transverse nasal crease is lighter in color than the surrounding skin, and may appear white . This is due to hypopigmentation resulting from the low level of melanin present in the damaged skin . In darker - skinned peoples, who have a high level of melanin in their skin, the line may appear dark brown or black . </P>

Why do i have a white line on my nose