Anecdote: Jalapenos really bother me, but I love them. I don't know what it is about them, but they give me days of problems when I eat more than a couple bites

Anecdote: Jalapenos really bother me, but I love them. I don't know what it is about them, but they give me days of problems when I eat more than a couple bites. I can eat much spicier capsicum peppers than Jalapenos, and fresno peppers seem to give me no problems at all (which are the nearest cousin I've found to Jalapenos). Does anyone know what I can do? Does my body's reaction to Jalapenos have to do with how ripe they are (green vs. red?), or is there any other reason or explanation by Jalapenos bother me but other peppers dont?