The most important characteristic of the herpes virus is that it is highly contagious. As a recipient of herpes, the virus can enter the body through the respiratory tract, mouth, and genital organs, and it is parasitic in the blood as well as in mucous membranes and nerve cells. For healthy people herpes virus infection may not cause any symptoms, if the patient’s immune function is reduced, overworked, or certain diseases occur, such as cold, fever, diabetes, tuberculosis, etc. can activate the virus in the body, causing the virus in the body to replicate in the nerves or at the skin, resulting in herpes attacks. The earlier the herpes virus is treated, the more effective the treatment will be.