Hi Doctor. I Got A Red Rash All Over My

Hi Doctor.

I got a red rash all over my body and eventually turns into a dark spots and I cant sleep at night because of the itchiness. I tried topical cream and zamatil ointment but still wont make any difference.

Can you please help me? I'm done all my blood test and my doctor cant figure out since all the tests turns out negative. I am absolutely tired and stressed out.

Patiently waiting for your response.

Thanks a lot.