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.
MUSCLES INVOLVED IN FROWN LINES: Procerus muscle. This is the big fan shaped muscle in the middle of the brow marked with the red crosses in the image below. The Procerus muscle causes horizontal frown lines. Corrugator Supercilii muscles. These are the muscles stretching out above the eyebrows marked with the green ticks in the image below. The Corrugator Supercilii muscles cause vertical frown lines. Depressor Supercilii muscles. These are the muscles on the sides of the Procerus muscle, although some people see these muscles as part of the Procerus muscle.