I experienced burining lips first after eating bbq in August, then every month since then. The triggers vary from pears, lemon pepper, hot sauce, toothpaste. So I finally went to the doctor, he prescribed Triamcinolone lip paste, and advised me to switched my tooth paste to organic Tom's tooth paste. So far my lips are better, I don't know what brought on these symptoms, but so far the tooth paste switch has helped.