Very high-risk sites
These sites are described to outline the risks - not because they are viable injection sites. If you are thinking about using these sites you may want to think about getting support to help you stop injecting.

Neck
Injecting into the neck is dangerous because your neck contains arteries going to your head, nerves, muscles and air and food pipes. It is also difficult to get a needle pointing downwards (with the flow of blood) into your neck. It’s also very visible if you get bruising or infection.

Breast
Although there are usually small veins visible in women’s breasts, it is dangerous to try and inject into them because they are very small and liable to break. They are also next to milk ducts which can easily be filled with fluid. Because there is no direct blood supply to the inside of the ducts, the fluid stays there and the risk of a very painful infection - called mastitis - is high.

Penis
Although there are veins visible around the penis, injecting into them is an extremely dangerous act of desperation.

The mechanism for getting an erection is for the veins of the penis to get smaller, restricting the flow of blood out; this causes the penis to fill with blood. Blocking the veins by collapsing them through injecting damage can cause a permanent, very painful erection.

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