Could you be allergic to your sunscreen?
Now, there are a lot less allergies than when PABA was being used. People did have allergic reactions to that, but there are still allergic reactions to sunscreens. Especially the combination of sunscreen and light, because there are changes chemically that happen in a sunscreen when you’re in the sun.
If you have allergies to various related compounds, other sunscreens or perhaps, sulfonamides or drugs that are related to sulfonamides like some of the anti-diabetic drugs, then you’re more likely to have an allergy to the sun screens. It would be good to look at that and discuss that with your doctor or your dermatologist to make sure that it’s not a similar compound to something that you already have an allergy to.
So, it’s possible, yes, you can have an allergy to sunscreen. Not common, but if you do, it would be best not using sunscreens at all that are related to the ones that cause trouble. Sometimes a different one will work where one isn’t allergic. You should get that figured out or test in a very small spot before you go and spread sunscreen all over your body and go out and have a generalized allergic reaction.