Doctors at a Cheshire hospital are warning parents about the dangers of their children's trampolines.
Staff at Warrington Hospital accident and emergency department have seen an increase in the number of accidents since the start of the summer holidays.
Dr David Geggie, a consultant at the department, said children can suffer very serious injuries on a trampoline.
He advised parents to make sure their trampoline had nets and that the poles are padded.
"Whenever summer comes, we see an increase in the number of trampoline injuries and the number of injuries connected with trampolines and bouncy castles in particular," he said.
"We seem to be seeing more and more of these in my department, and I am particularly concerned about young children, as they can come in with very serious injuries."
The Royal Society for the Prevention of Accidents said children under six years old are particularly vulnerable to injury.
It said to be aware that injuries can occur to all parts of the body, but that head and neck injuries are the most serious injuries associated with trampolines.