Many people catch a cold in the spring or the fall. 'There are many different kinds of cold viruses(病毒). You never know which one you may gel.
When you get a cold, your body works hard to stop it. You feel terrible because you can't breathe well, but your body is actually "eating" the virus. You get a fever, but the heat of your body is killing the virus.
Different people have different ways to deal with colds. In some countries, people may eat chicken soup to feel better. Some people take hot baths and drink warm water or milk. Other people take medicine to stop the fever.
Some scientists say that taking medicine when you have a cold is bad for you. The virus stays in you longer because your body doesn't have a way to kill it. Bodies can do a great job by themselves.