Testing: Herpes presents on the lip as a blister as part of the cycle, the liquid or serum will be contagious with hsv i. If the blister is of non-viral origin, the liquid (serum) will not contain the virus. The only way of knowing for sure is to be tested for the herpes virus. It is extremely common (50-80% of people have it), recurring episodes will happen throughout life.
Answered 4/15/2019
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