Why do pop tarts give me constant heart burn?

Maybe GERD?: Avoid foods & behavior that delay stomach emptying &/or relax the lower esophageal sphincter--spicy, greasy food, mints, alcohol, tobacco, chocolate, tomato-based products, caffeinated & fizzy drinks, eating before bedtime. Avoid food triggers (in your case, pop tarts) Lose weight as appropriate. Elevate head of bed on blocks. Have you tried acid blocker drugs yet or had/sought medical evaluation?