why do some people have dimples

.Preity Zinta, the Bollywood actress, celebrates her 44th Birthday this year on 31 January 2019. The bubbly, pretty Preity made her comeback with the movie Bhaiji Superhit starring opposite Sunny Deol and everyone was surprised to see that she still looked just as charming and beautiful as she did when she made her debut in Dil Se and Soldier in 1998, twenty-one years ago.

Both Preity and Shah Rukh Khan are popular for their dimpled smiles, that give them the bonus marks. Preity Zinta and Shah Rukh Khan have both been seen teasing each other about their dimples – Preity has one while the King of Bollywood, has two. But what is the reason for a dimple to occur when you smile? Why do some people have it while some don't?

Dimples are genetic

Some researchers say that dimples are genetic and are inherited from one generation to the other. However, dimples are an irregular dominant trait and therefore, even if both your parents have dimples, it is not necessary that you do, too. However, some specialists also believe that there isn't enough evidence to call dimples a genetic trait.

A short muscle

Another theory says that a dimple occurs because of a muscle that is shorter in some people because of which the dent occurs. A muscle called the zygomaticus major can cause a dimple if it is divided or short around the cheek.

Why do some kids have dimples that disappear as they grow up?

Some babies have dimples when they are really young which disappear as they grow older. The reason behind this mystery is that the dimple is caused due to the baby fat in the baby's cheeks. As the baby grows and loses the baby fat, the dimples are also lost. 

Can you create a dimple if you dig your cheek?

Sorry to burst your bubble, but you really can't do much about not having a dimple except eye Preity Zinta and envy her for her adorable smile! Since the dimples are either genetic or caused due to a divided muscle, your dream to have a dimple may be difficult to realise in this life. However, though we would not advise for or against it, it is claimed by some medical professionals that dimples can be created through a surgical procedure.

Why are chin dimples caused?

The chin dimples are caused due to a dent in the bone of the chin. They are neither genetic nor a muscle flaw, but reportedly occur when the left and right side of the chin bones have not fused together in the womb