I currently have Pityriasis Rosea. It’s a rash caused by a virus that is not contagious. I cannot wrap my head around how I’m not contagious to others, but I contracted the virus in the first place that made the rash appear. How does this work?
In: Biology
I am not familiar with that particular disease, so i can’t answer your question exactly, however a rash is usually an immune/allergic response rather than a true direct effect of whatever caused it. In some cases the cause/irritant may be present on the surface of the rash or blisters, or it might be under the skin in the tissues or even an unrelated body part.
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