Why should I leave the electric mattress on all night in this weather?

Maybe you are weak and afraid of the cold!

Harmful

The specific hazards are:

The easiest thing to appear is anger.

There is still the possibility of osteoporosis for a long time.

The biggest hazard is to turn on the electric blanket all night. Contact with the body will lead to the excessive temperature of the electric blanket, which is naturally dangerous and may cause short circuit, and both of them may catch fire. If the short circuit may directly electrocute people, the fire will be more serious.

So be sure to turn off the electric blanket before going to bed and turn it on half an hour to two hours before going to bed.