Can you sweat out a cold? Here's what science says

Most colds go away on their own with time, rest and hydration.

We've all been there — that familiar tickle in your throat that lets you know you're coming down with a cold. Sure to follow is a plethora of tips and tricks from well-meaning loved ones about how to feel better. One of the most common folk remedies you'll likely hear is to bundle up and hit the sauna or otherwise work up a good sweat. It's a remedy that's been passed down for ages, but can you really sweat out a cold?

What is a cold?

A cold is a common umbrella term for a contagious upper respiratory infection that affects your nose and throat. More than 200 types of viruses can cause a cold; rhinovirus is the most common. Adults usually get two or three colds each year, while children can get anywhere from six to 10. This is because children's immune systems aren't fully developed, making them more susceptible to viruses.

Contrary to popular belief, you can't get a cold from simply being out in cold weather. Getting a cold in the warmer months is possible, although it's less common. A combination of factors contributes to colds being more common during fall and winter. First, people stay inside more and are in closer proximity to others, which allows viruses to spread more easily. Also, viruses have more surfaces to live on indoors; if you touch an infected surface and then touch your face, the virus can enter your body through your mouth or nose. Additionally, lower temperatures and dry air (which is more common during the winter) can stabilize the outer structure of some viruses, making them last longer on surfaces.

Can you really sweat out a cold?

No evidence supports the notion that sweating will help kick a cold. So where does this old wives' tale come from?

First, it's important to note that there is no cure for a cold. Ultimately, you have to let the cold run its course, which usually takes seven to 10 days. However, some people may recover more quickly, while others can take longer to feel better.

When you have a cold, your immune system mounts a response to get rid of the infection. Symptoms like sneezing and having a stuffy nose aren't caused by the virus; they're how you know your body is trying to fight off the infection. Your blood vessels get bigger to let white blood cells access the virus. When the blood vessels swell, it can make your airways feel stuffy.

Your body may also raise its temperature to create a less hospitable environment for viruses. The fever response can cause sweating, which may be why some people believe sweating can cure a cold. Sweat's main job is to cool you down and regulate your body temperature.

How do you treat a cold?

If sweating doesn't work, how do you treat a cold? Here are a few methods that can help:

• Rest: When you have a cold, rest is essential to getting back on your feet quickly. Your body does its best healing when you sleep, and getting a good night's rest allows your immune system to devote maximum resources to fighting off the infection.
• Hydration: Drinking plenty of fluids, such as water and herbal teas, can help thin out mucus that causes congestion and soothe a sore throat. It also prevents dehydration.
• Diet: Eating nutrient-rich foods gives your body the fuel it needs to fight the infection. Fruits, vegetables and lean proteins provide the vitamins and minerals necessary to support your immune system.
• Moisture: While you can't sweat out a cold, steam from a hot shower or a humidifier can help relieve congestion and soothe irritated airways. Saline sprays can also help ease congestion.

Over-the-counter medications can help you manage some of the symptoms of a cold, such as body aches and congestion, and help you feel more comfortable while you recover. If your symptoms are mild, light exercise such as stretching or a short walk can temporarily boost blood circulation to relieve some of your symptoms. But be careful not to overdo it: Moderate or intense exercise can lead to dehydration or exhaustion that can prolong your recovery.

What science says about recovering from colds

"Sweating it out" isn't backed by research. The notion likely came from the observation that a fever is the body's way of fighting off infection. Most colds go away on their own with time, rest and hydration. Taking care of your body by slowing down and giving it the care and nourishment it needs is the best way to get through a sick season.

If you don't feel better within 10 days, or if your symptoms get worse, talk to your doctor.