5. Fever
Seeing as varicella-zoster is a virus, it should come as no surprise that you’ll suffer from a fever when you contract it. After all, the standard response that your body has to invasive pathogens such as viruses is to heat up your body in an effort to kill off the threat. Fever is found in both chickenpox and shingles due to the fact that your immune system generally responds in the same way to both of the conditions that the varicella-zoster virus causes
The fever will generally get higher if the varicella-zoster virus remains untreated and could pose a serious health risk if your body temperature gets too high. If you notice a fever coming on due to shingles or chickenpox then you should admit yourself to the ER if needed so that you can receive proper care and avoid hyperthermia.