Your skin may have small indentations called dimples. They can appear on various parts of the body, such as the lower back, chin, and cheeks. On the sides of the mouth, there are cheek dimples. You can have a dimple on either one or both sides of your mouth. You’ve probably observed that some individuals have cheek dimples while others do not. That’s because variations in the facial muscles and skin give rise to cheek dimples. Despite some debate, it’s commonly believed that they are inherited in a genetically dominant manner. A change in the zygomaticus major, a facial muscle, can occasionally result in dimples. This muscle affects how your face looks. It is the one that contributes to your smile’s raised mouth corners. The zygomaticus major muscle typically starts at the zygomatic bone in the cheek in people without dimples. After that, it curves downward and joins the corner of your mouth. The zygomaticus major muscle may split into two distinct bundles on the way down to the mouth in individuals who have dimples. At the mouth’s corner, one bundle connects. The other bundle is attached to the skin above and below the corner of the mouth. The zygomaticus major muscle that has this split in it is known as a double or bifid muscle. When you smile, the dimple is brought on by movement of the skin over the double zygomaticus major muscle. Cheek dimples are sometimes mistakenly referred to as a birth defect because they can be caused by a muscular variation that happens during fetal development. Remember that cheek dimples are not only fairly common but also have no detrimental effects on your health.