Instead of using medicine to treat a fever, Japanese people use cooling band-aids that are harmless, even for babies. As soon as the band touches the skin, certain reactions occur and you feel cold. The effect usually lasts for 8 hours.

In summer, people use cooling pads that, in other cases, are applied to bruises and injuries. You just have to shake the pad and it gets cold within a few seconds. The effect lasts from 15 minutes to an hour and a half, depending on the size of the pad.

In winter, warming band-aids are also used. You have to open the packaging, stick a pad to your clothing (as a rule, people put them in pockets, in shoes, or under jeans), and enjoy its heat of 85-105° F.