Emergency services were called to an address in Hampden Park on Easter Monday.
Police said they received a report of a 12-year-old boy in difficulty in a hot tub in Brodrick Road at about 4.53pm.
Paramedics and police rushed to the scene and an air ambulance was also scrambled.
A spokesperson at SeCamb said crews were called to a private address so would be unable to release any details.
A police spokesperson said the boy was taken to Kings College Hospital in London with bruising to the chest.
Photo by Jim Slater.