I am a female and i received oral sex from a male. the male had a scab on his lip from a cigarette burn, unsure if was bleeding.is this poss hiv risk?

Always unsure...: Any fresh breakdown of natural barriers - skin or mucosa by frictions through sex, may pose risk for body fluid exchange leading to virus transmission like that for HIV, hepatitis-B & C, etc. So, be tested for HIV or STDs in 1 month if high-risk factors present in you like known past infection in partners, multiple partners, homo..., anal sex, etc. Besides, be counseled timely for now and later.