At the initial stage, the snake string sore is a patchy red maculopapule, and then clusters of blisters the size of mung beans to soybeans appear, which are gathered in one place or several places like beads, arranged in a belt. Herpes are separated from normal skin. The liquid of herpes is transparent and becomes turbid after five to six days. Severe patients may have bleeding spots, blood bubbles or necrosis, while mild patients have no skin lesions, only tingling or slight redness, and no typical blisters. Serpentine bunches usually occur in the waist, ribs, chest or head and face, mostly on one side of the body, and are usually distributed along the cutaneous nerve unilaterally, usually not exceeding the midline. Those occurring on the head and face, especially on the face and ears, are in a serious condition with severe pain, and have swelling and pain nearby, even affecting vision and hearing.? Before the onset of the disease, patients often have prodromal symptoms such as hypersensitivity, skin burning and tingling, or mild fever, and general discomfort. Some of the pain occurs at the same time with the rash, and others occur after the rash.
