hello Dear Doctors,

I have met a girl who I think is HIV+, I shared and smoked a peace of cigarette which I noticed litter that it has blood from her lips on it which touched my lips and tongue.  also before that I kissed her on her lips which may was bleeding at that time also. 

1- can I get hiv from that shared cigarette which has blood  touched my lips and tongue?

The words of your opening statement --  "I have met a girl" -- usually mean a new sex partner, or perhaps anticipating sex in the future. If so, and if you have reason to believe she may have HIV, of course you should ask her directly, and share your own (presumably negative)_ HIV status as well. However, until you have sex, there is absolutely no risk of HIV from day to day personal contact, or even from sex short of intercourse. In households where one person has HIV, even after 20 years, nobody in that house ever catches HIV with regular sharing of kitchens, eating utensils, bathrooms, towels, etc, etc; or from non-sexual kissing, hugging, and other personal contact of the sort friends and family members have all the time. Likewise, the things you mention in your interactions with this new friend are no risk for HIV and other blood borne infections.

Also, people don't go around bleeding from their lips. I'd guess the red on the cigarette was lipstick, not blood. But even if it was blood, such minor blood contact carries little or no risk of HIV.

To your specific questions:

1,2) No risk from shared cigarettes or drinking glasses, even if the red marks were blood.

3) In theory, open mouth (sexual) kissing with blood exposure could risk HIV. However, this is exceedingly rare. There are very few cases of HIV attributed to kissing. Among the billions of french kisses that have happened among HIV infected and non-infected persons, including those with blood exposure, almost no cases. This is nothing to worry about.

4) You do not need be tested for HIV on account of these events. However, if you remain close to this person, and especially if you imagine a possible sexual relationship, just ask her! If she hasn't been tested for HIV recently, perhaps she will do that -- especially if you offer to go with her for testing together.

Going forward, just remember this:  You will never be at risk for HIV unless you a) have unprotected vaginal or anal sex or b) share drug injection equipment with a potentially infected partner. Without such exposures, you'll never get HIV. Don't worry about any other kinds of contact with other people.

I hope these comments are helpful. Let me know if anything isn't clear.

HHH, MD

thank you dr for your answers.

unfortunately she is not my girl friend so i can ask her about her status or asking her to go with me to test for HIV. I met her in a friends gathering and happened what I described earlier. 

I will not have a relation with her because I estimate that she is HIV+ and I don't want to have any risk

about  cigarette which has blood on it, it was little real blood because she asked me a pass a tissue for her to clean the blood she felt on her lipes. to ensue about it i asked her from where that blood she said "I peeled the dry skin off my lips". there fore i got worried of the things i shared within that time before the notice she was bleeding.

Repeating my comment above:  "You will never be at risk for HIV unless you a) have unprotected vaginal or anal sex or b) share drug injection equipment with a potentially infected partner. Without such exposures, you'll never get HIV. Don't worry about any other kinds of contact with other people."

Thank you so much Dr. All clear now and I am happy that I have no risk from the event I described. 

I have two last question to close this case and help me to move on.

1- Should I get test for HIV?

2- Can I have unprotected sex with my wife with no worries of transmitting HIV? 

That completes the two follow-up exchanges included with each question and so ends this thread. I hope the discussion has been helpful.