A biceps piercing tunnels midway through the biceps muscle (avg. 5 inch long, 2 inch deep). Although it belongs to the group of surface piercings, isn't surface at all as it. Good knowledge of the anatomy of the arm is absolutely necessary in order to avoid extremely serious injury by hitting the main artery, the main arm nerve, and big veins. A bundle of these important vessels lies between the biceps and triceps muscles, but other vessels lie, for example, at the front side of the biceps (the same veins used by your doctor to take blood samples). Additionally, it is necessary to think about the natural variables of human anatomy. A human being is not like a teaching book.
If the first step, pushing a needle through the arm works; the second step is to heal these extremely long and deep piercings, leading to a very difficult fistula formation. This step is further complicated by the fact that the biceps does a lot of movement below the skin, buffered by connective tissue (fascia, tendons and ligaments). The muscle moves inches while the skin does not. Jewelry fixes the skin at the position of the muscle, thus requiring an increase of the arm's skin elasticity. Before this process finishes, the arm will lose some of its range of motion due to painful stretching of the skin as well as to pressure the jewelry will cause to the muscle. During this time, the healing will be slowed and disturbed by these forces.
This piercing can work, but, consider the healing time as long, particularly painful, and dangerous for the potential of severe infections in the biceps or the entire arm. Alternatively, flexible materials can be used (nylon, tygon or PTFE for example). Chains also work well as jewelry for this piercing; however, using them includes several other serious risks.