What’s wrong with the painful bumps on my lower back?

The bumps on the waist with pain are considered as follows: a. Herpes zoster, the bumps or blisters are distributed in clusters, the rash travels along the peripheral nerves in a unilateral band, usually not exceeding the midline, and the disease is mostly due to a decrease in the immunity of the body, resulting in varicella-zoster virus infection. The causes of decreased immunity include sleep, poor rest, emotional stress, excessive stress, anxiety, as well as suffering from serious metabolic diseases such as diabetes, hypertension, hyperlipidemia, and even suffering from malignant tumors can cause a decrease in immunity. Second, papular urticaria, scratching after causing surface rupture resulting in pain, the disease is caused by insect bite allergy.