Whether small genital blisters are serious or not can not be generalized, if just ordinary allergies or external extrusion, bacterial, fungal infections caused by small blisters are generally not serious; if it is genital herpes is a serious. 1. Not serious: If the blisters are caused by localized skin allergies, or external pressure, bacterial or fungal infections, they are generally not serious and will gradually recover through active treatment. 2. Serious cases: if it is due to herpes simplex virus infection, caused by genital herpes, is a sexually transmitted disease, compared to ordinary infections are serious, and may be recurring episodes. The genitals long small blisters need to go to the hospital in time to check, clear diagnosis, follow the doctor’s instructions for treatment.