Kim Kardashian and Kanye West have been through a “scary” ordeal after their son Saint West came down with pneumonia and had to be hospitalised.

After TMZ reported the two-year-old was admitted to a Los Angeles hospital a few days after Christmas and spent three nights there, Kim confirmed the report.

“My precious baby boy is so strong,” she captioned a photo of herself holding Saint on Instagram.

“After spending three nights in the hospital and seeing my baby get multiple IV’s and hooked up to oxygen machines, our end of year was challenging.

“Pneumonia is so scary. I just want to thank every nurse & doctor out there who works so hard around the clock. 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.”

Kim and Kanye are just weeks away from welcoming their third child via a surrogate.