What Should My 4 Month Old Be Doing?

4/9/11 by Cynthia Lennon

Photo courtesy of Karen Sheets via Flickr

Has your baby just reached 4 months of age? If you’re wondering, “What should my 4 month old be doing?” check out the following information, which outlines how your baby should be developing. Remember: each baby develops at his own pace. If you have any questions at all about your baby’s development, don’t hesitate to consult your health care provider.


According to researchers, 4 month olds are capable of understanding the basic sounds that make up their native language. Your 4 month old may also experiment a lot with making sounds and be able to make sounds like “ma ma” and “da da.” To encourage your baby to communicate and teach him the importance of language, mirror his sounds and facial expressions.

Your 4 month old will also smile more often and do things to get your attention, such as fake a cough. Be sure to respond to all of your baby’s attempts to socialize with you to help him develop his communication skills. Your baby will also learn how to let you know when he’s not in the mood to chat by covering his face with his arm or turning his head away.


At 4 months of age, the only food your infant needs is breast milk or iron fortified infant formula. Your baby should be drinking about 5 to 6 ounces of milk 4 to 6 times per day. When your baby reaches about 6 months of age, you can start feeding him solid baby food. Many parents are eager to feed their babies solids at 4 months, but doing so could cause allergic reactions.


Your baby may start sleeping on a schedule by 4 months of age. Most 4 month olds are able to sleep through the night for about a nine hour stretch. In addition, 4 month olds usually take naps in the morning and afternoon that last about 1.5 to 2 hours each. Just keep in mind that your baby may make noises in her sleep or wake up in the middle of the night at this age. If you hear your baby fussing in the middle of the night, let him put himself back to sleep. If he can’t fall asleep on his own, speak to him softly or pat him gently on the back till he falls back asleep.

Growth and Development

Here are some milestones that babies typically meet at 4 months of age:

  • Roll over from front to back
  • Sit with support
  • Hold up his head and chest
  • Support himself on his elbows while he’s lying on his stomach
  • Grasp a rattle
  • Raise himself up on straightened arms while lying on his stomach
  • Squeal
  • Smile spontaneously
  • Laugh out loud

All babies are unique and meet their milestones at different times, so don’t panic if your 4 month old hasn’t met these milestones yet! These milestones simply describe what your child has the potential to accomplish at this age. In addition, keep in mind that if your child was born prematurely, he will take more time to meet his milestones than other children his age.

Common Problems That 4 Month Olds Have

Some problems that 4 month old babies commonly deal with include:

Photo courtesy of Neeta Lind via Flickr

  • Eczema
  • Diaper rash
  • Infant reflux
  • Colic

If you notice any of these problems, contact your health care provider. To ease your baby’s symptoms and make him feel more comfortable, invest in these trusted products, such as this this Diaper Creamor this nurturing diaper balmfor treating eczema, or these Doctor Brown Baby bottlesthat prevent colic and infant reflux.

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6 Responses to “What Should My 4 Month Old Be Doing?”

  1. Sheena
    April 10th, 2011

    I really enjoyed this, Cynthia thank you. It put a lot of my fears to rest and really addressed some relevant issues that I’m facing with my son who just turned 3.5 months. By the way, I use Doc Brown’s baby bottles. They really work to prevent colic.

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  6. muthukumar
    November 28th, 2012

    thank you so much – nice info

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