If a pencil accidentally pierces the flesh, it usually leaves a black spot, at which point, parents need not worry too much. Pencils are mainly composed of lead in graphite, so they will not affect your health. Of course, if there are serious black spots, you can go to the hospital for treatment. The main component of pencil lead is graphite, which does not contain lead and is harmless to the human body. Graphite is a scaly solid with a metallic luster. It is composed of the element carbon. Its structure is very stable. Nothing in the human body can destroy it, so it is non-toxic. The black spots left behind after being punctured by a pencil can be erased with an eraser if they are not broken. If they break and enter the body, the body will not be able to expel them. If you want to remove them, it is recommended to go to the hospital and use a laser. If they are very deep, a minor surgery is needed. Usually, when using pencils, parents should also remind their children to use them properly to avoid certain injuries. When a pencil has stuck into the skin, it can be sterilized with alcohol. If the situation is serious, the pencil can go very deep. Infection can be avoided if you choose to go to a proper hospital and follow the doctor’s advice on sterilization and treatment.