Hello,
Welcome to the ehealthforum and I am really glad to help you out.
Para-aminobenzoic acid (PABA) is a naturally occurring substance that is often used in sunscreen products. But a FDA report published in 1989 stated that a PABA ester component decomposed to a known carcinogen, despite any real proof that PABA in sunscreen was associated with cancer.
I suggest you to use other sunscreens instead which are PABA free.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.