Hello. Welcome to ask the doctor.
If the rash is close to the cold sore, I would like to advise topical antibiotic cream like mupirocin 2 percent initially followed by a combination of antibiotic and steroid like hydrocortisone.
Also, oral antihistaminics like levocetirizine is given for symptomatic relief.
Visit your doctor so that he can do a physical examination and give you a prescription.
You can share my opinion with him.
I hope it helps.
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