Kim Kardashian and Kanye West's son Saint West experienced a frightening health scare over the New Year holiday weekend.

Kim revealed Tuesday on Instagram her two-year-old Saint battled a case of pneumonia and was hospitalized for three days due to the illness.

"My precious baby boy is so strong! After spending three nights in the hospital & seeing my baby get multiple IV's and hooked up to oxygen machines, our end of year was challenging. Pneumonia is so scary," Kim captioned a black-and-white photo of herself holding Saint tightly in her arms.

The Keeping Up with the Kardashians star's son is now apparently recovering at home and doing just fine.

"I just want to thank every nurse & doctor out there who works so hard around the clock," Kim, 37, continued in her Instagram post. "We are so grateful for you all! He's home and all better. He's so resilient. I'm sure he will still say the ambulance ride was cool! My strong Saint."

On Friday, Kim shared a photo of her immediate family, including the couple's four-year-old daughter North, in honor of the holidays. They were standing in front of a Christmas tree.

Kim and Kanye just recently celebrated Saint's second birthday on December 5.

Kim and her rapper husband are currently expecting their third child via surrogate. North and Saint will become siblings to a new baby girl.

Kim's sisters Kylie Jenner and Khloe Kardashian are also pregnant right now.

Kylie has yet to publicly confirm her pregnancy with boyfriend Travis Scott, but sources have said they have a baby girl on the way.

As for Khloe, she confirmed she's expecting her first child, a son, with her NBA player boyfriend Tristan Thompson on December 20.

"My greatest dream realized! We are having a baby! I had been waiting and wondering but God had a plan all along... Tristan, thank you for loving me the way that you do! Thank you for treating me like a Queen! Thank you for making me feel beautiful at all stages! Tristan, most of all, Thank you for making me a MOMMY!!!" Khloe captioned an Instagram photo of her baby bump.

"You have made this experience even more magical than I could have envisioned!... I know we've been keeping this quiet but we wanted to enjoy this between our family and close friends as long as we could privately... Thank you all for understanding. I am so thankful, excited, nervous, eager, overjoyed and scared all in one! But it's the best bundle of feelings I've ever felt in my life!"
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And then one week ago, Khloe wished all her fans a Merry Christmas by sharing a photo of her baby bump in a silver sparkly jumpsuit and fur coat.