It's caused by one of the herpes viruses and it leads to painful blisters which last for a week or so.
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An easy diagnosis - it causes tingly or painful blisters in a band on one side of the body.
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So are they worth the painful blisters?
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It causes painful blisters and sores.
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The side-effects include severe burns, which turn to painful blisters, and heatstroke.
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