Interferon suppositories do not have the longest use time, usually kept between 3 months to 2 years, specific need to be determined in conjunction with the treatment, the condition. Interferon suppositories have a broad-spectrum antiviral effect, clinically it is mainly used in the treatment of HPV virus infection, vaginal viral infections and other diseases, can inhibit the reproduction and growth of the virus in the lesion area, enhance immunity and phagocytosis of macrophages, so as to clear the body of the HPV virus, there is no fixed use of time, need to be combined with the condition and the treatment situation to determine. In general, mild HPV virus infected people use about 3 months, the condition can be improved to realize HPV conversion; but there are many HPV virus infected patients need to use 1-2 years to realize the conversion. During the use of interferon suppositories, it is still necessary to carry out regular TCT examinations, and at the same time to develop good living and eating habits, eat more vitamin-rich foods, and adhere to sports and exercise.