Interferon is generally recommended to be inserted as deeply as possible without damaging the vagina, but care should be taken not to use the drug for a long period of time. Interferon needs to be inserted deep into the vagina in the posterior fornix area, without damaging the vagina, it is generally recommended that it be inserted as deep as possible, because inserting it too shallowly will easily lead to the vaginal pessary melting and then flowing out, thus reducing the effect of the drug. Interferon is a kind of cytokine, with a variety of effects such as regulating immunity, anti-virus, inhibiting cell division, anti-tumor, etc. For patients suffering from cervical cancer, HPV infection and other diseases, they can achieve certain therapeutic effects through the use of interferon, but because interferon can promote apoptosis, so it can not be used for a long time. When patients need to use interferon for the treatment of disease, it is recommended to follow the doctor’s instructions after identifying the cause of the disease, do not use drugs privately, so as not to aggravate the condition.