After a human body is infected with the varicella-zoster virus, the virus can remain dormant for a long time in the posterior spinal nerves, nerve roots, or trigeminal nerve roots. When the body's immunity is lowered, it can trigger the disease herpes zoster. The onset of the disease indicates that the patient has recently been fatigued or suffering from serious diseases such as malignant tumors, leading to lowered resistance. Therefore, during the period of suffering from herpes zoster, patients should not only pay more attention to rest but also be particularly careful with their diet. They should eat less spicy, stimulating, and greasy food, and avoid smoking, alcohol, and betel nuts. They can eat more nutritious food with a high content of dietary fiber and protein, such as fresh vegetables, lean meat, and nuts, to enhance resistance.