Sharing razors carries the risk of HIV transmission. If a person with AIDS uses a razor and breaks the skin or mucous membranes, the razor will contain HIV, and if a normal person uses the razor and breaks the skin or mucous membranes, HIV may enter the normal person’s body and cause infection. In addition to the risk of HIV transmission from sharing razors, there is also the risk of HIV transmission from sharing needles, improper tooth extraction, tattoos and pedicures. Of course, the most common ways of transmission are through blood, sexual contact, and vertical transmission from mother to child, as well as through medical sources such as transplantation of HIV-containing organs and occupational exposure of health care workers.