Have you tried antihistamine tablets (& if available there creams)??
You could try having a long soak in warm (not , repeat not hot) bath with pinetarsol, or calamine lotion, or apple cider vinegar. Problem is that as we're all different, so different things work for us. If you have any chance of having a fever take asprin/tylenol. Think about when this started & whether you had started using anything different, washing powder, soap, perfume, new clothes/underwear????
You must not scratch them as that might cause them to become infected.
The other suggestion is go to er or dr, certainly you need to do this if the rash continues!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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