Diseases and Conditions

Know how to prevent, treat and control the symptoms of various diseases and medical conditions. We explain what's happening in your body when disease strikes, and what you can do to feel better faster.

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Marked at Birth: Your Birth Month, Allergies and DNA Are Linked

Although scientists knew that birth season affected people's allergy risk, they didn’t know why this happened. A new study gets us one step closer.

Blame That New Food Allergy on Your Transplant

A man inherited his sister's kiwifruit allergy after she donated some bone marrow cells to him, a study confirmed.

10 Ways That Doctors Treated Infections Before Antibiotics

With the rise of drug-resistant bacteria, scientists are taking a second look at infection treatments that were popular before antibiotics. Which ones might work today, and which ones are just quackery?

How Genetic Discrimination Works

Just how common is it for schools, jobs and insurers to turn people away based on their DNA?

Daily Coffee May Lower Risk of Both Liver Disease and Multiple Sclerosis

New studies find links between regular coffee intake and lowered risks for cirrhosis and multiple sclerosis, but you've got to drink a significant amount.

How Zika Virus Works

As the Zika virus spreads, there's still much health experts don't know. So just how bad is the outbreak, and is it really connected with the rising cases of microcephaly?

Charlie Sheen's HIV Disclosure Measurably Raised Public Awareness

Only Charlie Sheen knows exactly why he went public with his HIV diagnosis last fall, but public health researchers are glad he did, as more people sought information.

We're So Close to Eradicating Polio! Here's Why The Last Few Hurdles Are Tricky

As we approach a 100 percent polio-free world, several significant hurdles remain. We'll have to make some changes to vaccine strategy to succeed.

Viking Toilet Worm Investigation Finds Genetic Clues to Emphysema's Origins

Genetic mutations in ancient Vikings protected them from parasites, but contribute to our modern susceptibility to lung diseases COPD and emphysema.

Two New Studies Find Potential Harmful Effects of E-Cigarettes

Studies presented at the 2016 AAAS meeting find an impact on immune system genes and on the potential for artherosclerosis.

New Study: Chronic Fatigue Syndrome Affects Teens More Than Thought

Children with chronic fatigue syndrome miss more school and face more adverse environments than healthy peers, finds a new UK study.

Now You See Them, Now You Don't: The Trouble With Allergies

The sixth-leading cause of chronic illness in the U.S. remains maddeningly difficult to figure out.

WHO: Zika Outbreak Is a Global Health Emergency

The WHO has declared such an emergency only three times before. And in the U.S., public health authorities are reporting the first sexually transmitted Zika infection.

Is Being 'Civilized' Ruining Your Back?

Some say indigenous people don't have backache the way those in industrialized societies do because of the way they carry themselves. But is that true?

The Year in Poop

If you spent the year on the International Space Station, you could drop about 180 pounds of personal payload. That's just one crazy fact we learned about No. 2 in 2015.

How Whole-Body Cryotherapy Works

Is surrounding yourself with supercooled nitrogen gas a smart move for pain relief or a bunch of pseudoscience?

Why You Should Let a Pigeon Perform Your Mammogram

While pigeons probably won't be donning lab coats anytime soon, they are proving their prowess when it comes to detecting cancer.

How False Positives Work (and What They Could Mean for Your Health)

Depending on the test and other factors, a false positive reading for cancer could be as high as 50 percent. What causes false positives, and what does it mean for the patient?

Turducken of Horror: Cancer in a Tapeworm in a Human

The parasite-host relationship just got a lot more complicated.

What the Heck is Tech Neck? How Millennials Could Be the Wrinkliest Generation

Are turkey necks the next man bun? Turns out smartphone use can increase the wrinkle factor for saggy skin known as "tech neck."

Is it possible to be allergic to water?

The human body requires water to thrive, so how could one possibly be allergic to H2O? Consider the strange case of one teen who broke out in hives after swimming.

Is it possible to be allergic to your own blood?

With blood pumping through your body every second of the day, it seems unthinkable that this life-giving substance could be an allergen. For some people, it's not weird science — it's reality.

Is it possible to make yourself allergic to something?

Allergy symptoms like itchy, watery eyes aren't any fun to deal with. Could you be causing your own pain with certain patterns of behavior?

10 Superstitions About Death

Death is a fact of life. Since the beginning of time humanity has come up with numerous superstitions to come to terms with the dearly departed.


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