Olive seems to be fine with her flea meds (she's had them twice now) but I do think that I'm allergic to it

I develop a rash on the back of my hands, but I'm not sure what it's from. Now that it's gotten worse since yesterday (when I put the flea med on her again) I think it may be from that. Oh well, more important for her to be flea free! My hands will stop itching eventually.