. The occurrence of the disease may be related to physiological variation or local stimulation. This disease is more common after puberty, with white, skin color or reddish papules, which are arranged in a row or series along the coronal sulcus, about the size of a needle tip to a small grain of rice, and are pearl-shaped, with smooth surface and no fusion. This disease generally has no symptoms such as itching and pain.
The size of the rash has not changed. According to the investigation of some medical scientists.
The incidence of this disease in natural population is about 10% ~ 30%. Clinically, it is necessary to distinguish this disease from condyloma acuminatum, and some illegal clinics often deliberately confuse the two, exaggerate the harm and defraud money.