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An electric blanket is a blanket that contains integrated electrical heating wires.
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Old or damaged blankets are a concern of fire safety officials, due to the combination of heat, electricity, the abundance of flammable bedding material, and a sleeping occupant. In the United Kingdom, it is estimated that 5,000 fires per year are caused by faulty electric blankets,[5] of which 99% are believed to have been caused by blankets 10 years or older.[6]

Electric blankets also present a burn risk to those who cannot feel pain, such as those with diabetic peripheral neuropathy, or who are unable to react to it, such as small children, quadriplegics, and the elderly.[7]
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Some scientists have speculated that SLF-EMFs could cause cancer through other mechanisms, such as by reducing levels of the hormone melatonin[citation needed]. There is some evidence that melatonin may suppress the development of certain tumors.[8]