hello Wonda,
you didn’t give many details so here is my method when reviewing products. Hope this helps:
1. I check for the ingredients and leave all unnecessary products out. ( cleanser, review serum and spf/ moisturizer stay )
2. if the new product has perfume, I use only fragrance free products with it - don’t mix perfumes as that can give you more sensitivity
3. Many SPF cause stinging for me because I have sensitive skin, k beauty SPFs are more friendly with my skin and many are fragrance free.
4. Stinging is not always a broken barrier skin; many chemical sunscreens have ingredients that are simply not ok. Try SPF baby/children products; they often don’t contain the harmful ingredients and some even advertise ok to use on the eyes - like the liposome SPF from Cetaphil
good luck finding a solution for your skin