Why Do Kids Suck Their Thumb?

By Yashika Goel
05 Jul 2025, 20:00 IST

Most of the kids suck their thumb while growing up. It’s a normal, harmless behaviour that should stop by the age of four. Tap to read why kids do this!

Self-soothing

Babies are born with a natural sucking reflux which helps in feeding. It helps them feel more comfortable.

Comfort in sleep

Thumb sucking helps the baby feel more relaxed and calm. It helps the baby fall asleep faster at night.

Natural reflux

Thumb sucking is a natural way to comfort themselves when kids are more afraid, tired, bored or in a new environment.

When should you worry?

If the habit is persistent even after the age of 4-5 years, take them to a doctor. As this can alter teeth and gum formation.

Speech difficulties

Aggressive thumb sucking can lead to dental issues and disrupt proper speech development in kids.

Encourage alternatives

Try to provide them comfort through hugs, giving them their favourite stuffed animal or a cosy blanket.

Information Credits

This information is taken from WebMD. However, it is always advisable to consult a paediatrician for expert advice.