The immediate cause of shingles is varicella-zoster virus infection, which can be triggered by certain factors and a decrease in the body’s immunity. Herpes zoster is caused by varicella-zoster virus infection. If there is a history of chickenpox at a young age, the varicella-zoster virus will be latent in the body, and it can be latent in the nerve roots. The symptoms may be triggered by certain factors and a decrease in the body’s immune system, such as fatigue, malignant tumors, and the use of immunosuppressants. Erythema, papules, clustered blisters may appear on one side of the patient’s body, which may be accompanied by obvious pain and burning sensation, mostly paroxysmal. The pain tends to be more intense in older and weaker patients. Patients are advised to take good care of the local area, combined with the doctor’s advice and active treatment, which can promote recovery.