Whether or not there is a risk of contagion from being stuck in the hand with an insulin needle depends on whether or not the needle has been used by a person who carries a contagious disease. There is a risk of contagion if the user of the needle has AIDS, Hepatitis B, or syphilis, etc.; if the needle has not been used, it is generally not contagious. Being stuck in the hand by an insulin needle carries a risk of contagion if the last user of the needle has AIDS, hepatitis B, hepatitis C, syphilis, and other diseases that can be transmitted through blood. In addition, if the needle sticks your hand after coming into contact with unsterilized skin or an object, you may be at risk of contracting bacteria, viruses, and other infections. If the needle has not been used, or if the last user was a simple diabetic without a disease that can be transmitted through blood, it is generally not contagious. Sticking your hand with an insulin needle should prompt hospitalization.