This is Dr. David
you could have a bad skin infection there like a MRSA skin infection which is resistant to Fucidin
or you could have a skin cancer at the very top of the ear
skin cancer of the ear is most common at the helix or very top of the ear
you need a proper skin biopsy of the area to rule out skin cancer and a good skin wound culture to check for MRSA skin infection or other possible skin infections.
MRSA is methacillin resistant staph aureus bacteria which could be causing the crust and pink swelling and blister.
have you been out in the sun a lot during your lifetime?
I STILL HVE NO IDEA WHAT HAS CAUSED THIS