Finger sex is generally not an HIV infection. The main ways of HIV transmission are blood transmission, vertical mother-to-child transmission, sexual contact transmission and other transmission, such as irregular tooth extraction, tattooing, intravenous drug use and transplantation of organs containing HIV, occupational exposure of health care workers, etc. For each other or one party has AIDS, if there is a break in the finger, there may be mutual contagiousness, and the chance of contagiousness is also relatively low, and the size of contagiousness has a lot to do with the amount of HIV in each other. If this is the case, it is recommended to check the HIV antibody for clarification after the window period.