It's too hot! How can I sleep at night to make my bed cooler?

It's dog days again, and the hot and humid weather has repeatedly frustrated people's desire to "have a good sleep". Medical experts pointed out that scientific and reasonable arrangements for "food, clothing, housing and transportation" can also have a good sleep in the heat. Have a good sleep, wear loose pajamas and avoid exposing your chest and abdomen. Many people sleep with bare arms in hot summer, thinking that they can get maximum coolness without clothes. ...