Herpes zoster is a common clinical skin condition characterized by erythema and blisters with significant pain. The use of infrared laser irradiation is a very common method of treatment and is effective. Herpes zoster is caused by edema of the nerve roots due to viral infection, which leads to nerve damage and produces significant pain. Infrared laser irradiation is effective in treating herpes zoster because it improves local blood circulation, promotes inflammation, accelerates wound healing, and has an analgesic effect. It is usually necessary to irradiate once a day for about 15 minutes each time for about a week, and with medication, most shingles will be cured.