KIMBERLEY Walsh rushed her toddler Nate to hospital twice after he suffered a nasty injury on their half term break.
The Girls Aloud star admitted "it killed me" as she saw her son in agony after the accident.
And she took to Instagram to warn mums to listen to their instincts, after the two-year-old was sent home from the hospital and they were forced to back the next day.
The tot then underwent x-rays before they discovered his internal injury after he fell off a chair.
Kimberley, 41, penned: "Not exactly how I hoped half term would go. My little climbing monkey fell off the chair and landed funny on his arm.
"I knew something wasn’t right so we went to A & E to get him checked over.
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"The nurse thought he was fine so sent us home but he really wasn’t happy."
Kimberley, who also shares Bobby, seven, Cole, four with husband Justin Scott, said the tot was unable to sleep and she knew something wasn't right.
"After a very unsettled night and him really not wanting to use his arm at all we took him back the next day and asked for an X-ray," she added in a lengthy post.
"Turned out he had dislocated his elbow.
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"Poor little thing was so brave it kills me. Moral of the story is trust your instincts."
"I knew something was wrong thank god we went back.
"He’s back to his normal self again but unfortunately the climbing hasn’t stopped."
Replying to her post, one mum replied: "100 per cent trust your instincts. My son would have died if we hadn’t.
"After a number of trips to a&e and on the last one refusing to leave the scan showed his whole bladder full of cancer and close to exploding. You are obviously an amazing mumma who knows her baby so well xx"
A second said: "How was that missed! Poor little guy!!! Well done momma for getting him sorted."
Kimberley, 41, lives in the million-pound mansion with Justin and the kids.