Dimples are small indentations in the skin that can occur on different parts of the body, including the cheeks, chin, and lower back. Cheek dimples are the most common type of dimple.

There are two main theories about why some people have dimples. One theory is that they are caused by a difference in the structure of one of the muscles in the face, the zygomaticus major. This muscle connects the corners of the mouth to the cheekbones. In people with dimples, this muscle may be slightly weaker or shorter than in people without dimples. When this muscle contracts, it pulls the corners of the mouth upwards. In people with dimples, the skin may also be pulled inwards, creating a dimple.

The other theory is that dimples are caused by a difference in the way the skin is attached to the underlying muscle. In people with dimples, the skin may be more loosely attached to the muscle, which allows it to be pulled inwards when the muscle contracts.

Dimples are thought to be a genetic trait, although the exact genes involved are not yet known. They tend to run in families, so if one of your parents has dimples, you are more likely to have them as well.

Dimples are not harmful and do not require any treatment. They are often seen as a sign of beauty and attractiveness, and many people are proud of their dimples.

Here are some other interesting facts about dimples:

• Dimples are more common in people of African descent than in people of European descent.
• Dimples are more common in women than in men.
• Dimples can be removed through surgery, but this is a relatively rare procedure.
• There is a myth that dimples are caused by sucking on your thumb as a child. However, there is no scientific evidence to support this claim.