If the cold and runny nose is very serious, you can fold the hot towel in a rectangular shape placed on the forehead, which will help the cold get better, usually about 15 minutes to reapply.

If you get less than 7 hours of sleep a day, your chances of catching a cold are three times higher. Experts at Yale University have found that sleep disruption or lack of sleep can affect immune system activity.

One of the most important reasons why you get colds in the cold season is that your nose is not kept warm, and it's usually cooler, which can easily lower your resistance to infection. If it's too cold, you might want to wear a mask or scarf in advance to help keep your nose warm.

If your hands are dirty, hand sanitizers alone (unless they are 60-80% alcohol) will not sterilize them, so wash your hands frequently with soap when you get home from outside.