Kourtney Kardashian’s son Mason OK after being hospitalized for peanut allergy

47013, NEW YORK, NEW YORK - Wednesday November 3, 2010. Kourtney Kardashian holds onto her son Mason as she climbs out of a SUV and heads into a building in Manhattan. Kourtney could be seen wearing a fur vest, knee high boots and carrying a rather large purse. Photograph:  Wagner Az, PacificCoastNews.com

Kourtney Kardashian was in for a scare on Friday night after her son Mason started throwing up and and had the hives on his face after eating peanut butter.

Kourtney posted the following on her blog:

Friday night Mason ate some peanut butter and had a little allergic reaction to it. He threw up within minutes of tasting it and got hives on his face. I called 911 and the fire department came immediately. They suggested that we take him to the hospital, so we did. He was in good spirits the whole time and didn’t even know anything was wrong. He even enjoyed riding in the ambulance. He’s such a good boy!!

I learned such a lesson with this…to always follow my instincts and call 911. Always better safe than sorry.