Here are a few of the chemicals in tobacco smoke and other places they are found: Acetone â found in nail polish remover. Acetic Acid â an ingredient in hair dye. Ammonia â a common household cleaner. Arsenic â used in rat poison.
Dimples are especially common in the face, because the muscles pull the skin on the face around, instead of just pulling around bones. The face also has bits of body fat, which cause the dimples to be more visible. Most cheek dimples are the result of a shortened muscle, zygomaticus major, pulling on the skin. There are dimples in the chin and the elbows, as well. At rest, it's not noticeable, but as the muscles around it pull into a smile, its shortness creates divots in the face.
It should be noted that there are different types of dimples which may form on the face. Most commonly, people with dimples have one dimple in each cheek which is visible when they smile. In some cases, the dimples are so poignant that they are visible even when the individual is not smiling.