There is a risk of contracting AIDS from oral sex by AIDS patients. By AIDS oral sex has the risk of HIV infection, but the probability of infection is relatively low, human saliva does not carry HIV, its main mode of transmission is still through the blood and sexual genital secretions, but oral sex process, if the other party has bleeding gums, mouth ulcers bleeding bleeding and other bleeding, this time the blood contact to the genital broken skin may cause the risk of HIV infection. General oral bleeding, bleeding is a trace amount, which contains less HIV stock, and the human body itself has a skin barrier to protect, no breakage of the probability of infection is also relatively low. Suspected of having a history of contact with HIV, timely to the CDC, regular hospitals to avoid delays.