Mum's horror after her baby was horribly injured on a public change table.

Picture this: you’re out with your baby, running a few errands here and there when you realise it’s time for a nappy change.

Luckily, there’s a public change room close by, so you lay your child down and suddenly they begin to cry.

Being too young to speak, you assume they’re tired or hungry and continue to change the nappy. It’s only when you pick your child up you realise the true reason for their tears — your baby had been lying on pins which left holes in their back.

Wait, what?

This was the reality for a mum in the UK.

Hayley Turner has posted a word of warning to fellow mothers on Facebook, after her infant son was pricked with pins on a public changing mat.

The Facebook post, which has been shared over 100,000 times, details how her son Samuel started to cry when she laid him on a public changing mat.

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"I dismissed it as him being tired, cold and grumpy so I changed him as quickly as possible so I could give him a cuddle and calm him down," Hayley wrote.

We can only imagine Hayley's horror when she realised what had really happened.

"It turns out some low life scum thought it would be 'fun' to deliberately put drawing pins in the bottom of the changing mat," she said.

"He now looks like a pin cushion with five holes in total! Angry doesn't even cover it."

Hayley hopes her story will encourage mums to check their changing mats in the future.