Health Conditions

How much exercise is enough, and what happens to your heart with daily, deliberate physical activity?

Researchers have been looking into the exact ways that alcohol, and specifically wine, can cause headaches.

Though it is rare, it is possible to be allergic to the cold. In fact, you might be allergic to cold weather if this happens.

While it may not sound the most appetizing, some people might find themselves craving - and actually eating - chalk. Why does this happen?

Stress is known to wreak havoc on the body, but studies have found that physical or emotional stress may actually cause a fever in some people.

For years, studies have suggested that vitamin D, while important for healthy bones, is also relevant for fighting viruses.

The stomach flu is an infection of the intestines that can be caused by a variety of germs. How long are you contagious if you have it?

Have you heard of something called "broken heart syndrome?"

Although the flu affects up to 8 percent of the United States population each year, there's still plenty of myths circulating about this illness.

Even at normal temperatures, your hands may get uncomfortably frigid when you've been typing for a long time — but what causes this?

Approximately 50 to 80 percent of American adults are affected by herpes simplex virus-1 (HSV), the virus responsible for cold sores. This is what really causes cold sores and how to prevent and treat any outbreaks.

On the day you get a flu shot, you could rightfully pick up a pizza, drive home, and set up camp on your couch for the evening. If you'd rather head to the gym for your favorite spin class, but you're concerned since you have just received a vaccination, then you can breathe a sigh of relief.

Congratulations! You've just finished your cardio and strength routines, and you're feeling good. Your body feels tired but strong all at once. You're humming the last song on your playlist. The sweat is still pouring — but for some reason, your feet are cold. Here could be the reasons why.

If you've ever wondered why your arm hurts after getting a flu shot, look no further. Soreness or pain in the arm and shoulder area is caused by inflammation. Why does this happen?

It's hard enough dealing with the discomfort and pain caused by illness. And it's even worse when you're not sure what kind of sickness you have. Is it the common cold — or is it a sinus infection, which might require a trip to the doctor for treatment?

Your cold symptoms are finally gone, and it appears the time has come to re-enter society as the healthy human you are. But before you dive in, press pause on those plans to resume daily life and consider others around you.

The cold sweats, chills, debilitating headache, and muscle aches; there's no denying that having a fever can make you feel quite lousy. However, that pesky high temperature that's making you feel miserable is actually an indicator that your body is working for your own good.

You may have swiped on a little lipstick and mascara to achieve the 'fake it until you make it' vibe during the time you were unwell, and we don't blame you. But now that your cold has passed, does that mean the germs you spread to your makeup have guaranteed them a visit to your garbage can?

If you generally consider yourself a healthy person, getting the occasional headache is just one of life's annoyances — an ailment as common (and as seemingly harmless) as the common cold, indigestion, or a mosquito bite. Except... when it's not.

When we're just children, we're taught to layer up against the cold when going outside in the fall and winter months. In addition to comfort, the idea is that we're better protected against colds and viruses by keeping warm. Why does it work that way?

Most of us have experienced the odd sensation of burning up with a fever and feeling ice-cold at the same time. It's one of the bodies' paradoxical states that leave us baffled — and usually feeling better after a while. But what's actually going on?

Even for those lucky early birds who have their morning routines down to a synchronized dance, the tempo can get away from them sometimes, leaving no time to dry their hair — but you'll want to think twice before you leave the house with wet strands on the chillier days.

Women are generally colder than men, and the hub's insistence on keeping the temperature at an arctic below 70 degrees is grounds for... well, a second glass of wine!

An annual flu vaccine is the best way to reduce your chances of contracting influenza and spreading it to others, according to the Centers for Disease Control and Prevention. Yet some people remain nervous about getting the flu shot. Can the flu shot actually give you the flu?

Hold the door for someone, and you could grasp some flu germs. That's because the influenza virus can live for up to three days on plastic and stainless steel, two materials we touch daily on doorknobs and door handles, faucets, light switches, and cell phones.

If you've ever had a headache that won't go away with the help of over the counter medicine like acetaminophen or ibuprofen, it may not be a headache at all. It could, in fact, be a migraine. What's the real difference between the two?