A toddler ended up in hospital when the thermometer his mum had inserted into his bottom disappeared from view when he fell over and sat on it.
The 18-month-old's mother said he "wouldn't sit still" and "kept moving" as she tried to check his temperature, concerned he had a fever.
The boy from Wenzhou City in East China's Zhejiang Province then wriggled away from his mum, falling onto the floor with the instrument still inserted.
He sat on the thermometer which then became lodged in his rectum and his mum unable to retrieve it.
Doctor Shao Fangbin with the Yuying Children's Hospital, took scans which clearly highlighted the thermometer, lodged in the child's rectal passage.