Online videos show the toys being heated up so that they are soft and easeir to squeeze.
However, experts are now asking parents not to heat the toys, as it causes pressure to build inside the squishy, increasing the risk it may explode and release the hot gel inside that can stick to the skin and cause severe burns.
Six children have been treated at the Royal Hospital for Children (RHC) in Glasgow with injuries linked to the trend over the past eight months, with some requiring surgery, including skin grafts.
Joseph must now avoid direct sunlight on the graft area for two years. (Image: PA)
Warning over exploding toys burning children
One of those hurt was eight-year-old Joseph Erskine from Clackmannanshire.
His mother, Stephanie Ewing, said: “My husband and I were home. We were sitting in the living room next door when Joseph came in holding a towel to his face.
“He had already wiped off the burning gel which had also taken off his skin.
“He was saying that his squishy burnt him and we initially thought he meant a chemical burn.
“Then he told us that he had put it in the microwave.
“We were shocked as it had never crossed our minds that he would do that with a toy.
“He has never used the microwave before.
“Joseph’s burn wouldn’t heal on its own and required a graft, where skin was taken from his thigh and applied to his chest.
“He is normally such an active and sporty child with six clubs per week, but all of that is on hold until he heals.”
The injury happened after Joseph saw the trend online, and now his mother is urging other parents to talk to their children about the dangers.
A similar case involved 11-year-old Scarlet Rowe from Irvine.
She suffered burns to her face and eyelid after heating a squishy toy in May.
Her mother, Gina, said: “We didn’t realise what had happened at first, it just looked like slime on her face.
“It was only after a few minutes we realised it had been heated and was burning her skin.
“The swelling was so bad that we weren’t sure what the outcome would be.
“Thankfully, no graft was required but it is so close to her eye that this could have been a lot worse.
“These toys are very popular and easy to buy, but we had no idea about the risks.
“We had only bought them that day.
Scarlet suffered burns to her face and eyelid after heating a squishy toy. (Image: PA)
“I’d strongly advise parents to be vigilant and check what children are watching and trying online.”
Medical experts warn that heating squishy toys in the microwave causes pressure to build up.
This can make the toys explode and release hot gel that sticks to the skin, causing severe burns.
Sharon Ramsay, a burns nurse at the Royal Hospital for Children, said: “Unfortunately, we are seeing a growing number of children with preventable injuries linked to this trend.
“When these toys are heated, the contents can explode and stick to the skin, causing deep burns.
“These injuries can be very serious and may require long-term treatment, including surgery and rehabilitation.
“In some cases, children are left with permanent scarring.
“We strongly urge parents and carers to speak to their children about the risks.”
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Videos on social media platforms have been promoting the idea that microwaving squishy toys makes them softer.
Burn specialists say injuries from the trend may be especially severe.
This is because the gel inside the toys can remain extremely hot and adhere to the skin, causing deeper and more prolonged burns.
Healing and recovery from burns can take weeks or months and children who suffer them often need ongoing care including dressings, physiotherapy and scar management.
The Scottish National Burns Centre is hosted within NHS Greater Glasgow and Clyde.
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