Why do i develop herpes/cold sore on my lips everytime i do a blow job on my husband?

Herpes is unlikely: Something doesn't compute. Sexual exposure doesn't trigger herpes outbreaks. Consider re-posting your question with more details about symptoms: exact location of the sore(s), timing after oral sex, how long they last, etc. Are these outbreaks typical for others in the past? If your oral herpes was professionally diagnosed, provide details such as test results.