Health A-Z Slideshows

When you go for a dip, you can come across some nasty bacteria, viruses, and chemicals. Find out what to watch out for and how to protect yourself.

Find out why your doctor asks about your relatives’ health conditions and how you can get the information if you don’t know.

Swollen feet can be concerning and even painful. Find out more about things that can make your feet swell and what you can do about it.

Could your sore or ringing ears be a sign of something else? Find out more about what your ears can tell you about your health.

You go to the doctor to get better, but sometimes miscommunication, bad training, or other human error can get in the way of treatment. Find out what you can do to help prevent that.

You’ve been to the doctor, picked up your prescription, and are taking your medicine as directed. But if it’s not working like it should, check out these things you eat and drink that can change the way some medications work.

EKG, UTI, RICE and more: Click through to find out what each letter means and why it’s important.

Find out more about some of the things your doctor does at your annual physical.

When you have ringing in your ears, things you do might make the sound louder. From loud noises to stress, here are things you may want to avoid.

Looking to give or get a kidney? WebMD tells you some surprising facts you may not know about the process.

WebMD's 2016 Health Heroes awards, hosted by Robin Roberts, recognized celebrities, doctors, researchers, and leaders including Seth Rogen, Lauren Miller Rogen, Betty Farrell, Ed Damiano, and Trisha Prabhu.

Everything you need to know about infection with this virus, from causes to symptoms to how to prevent it.

Are you honest with your doctor? You should be, if you want to stay healthy. Check out the 13 lies you’re most likely to tell your doctor.

U.S. presidents have had many different ailments, including some that remained secret for years after their terms ended. Click through to find out more.

Extra fluid can build up and cause swelling when there's a problem with your lymphatic system. Find out when it's likely to happen, how to treat it, and more.

Get to know your bug bunkmates: WebMD introduces you to the critters that share you home with you, from ants, roaches, and beetle to spiders and more.

WebMD's 2015 Health Heroes awards, hosted by Robin Roberts, recognized celebrities, doctors, researchers, and leaders including Glenn Close; Bennet Omalu, MD; Ronald “Jake” Clark; and Kenneth Shinozuka.

They've gotten a bad rap over the years due to some athletes using them illegally, but steroids can help treat a variety of health conditions. Learn about the different types and what they do.

Do you know what all the info on your over-the-counter meds means? WebMD breaks down the most important parts of a drug label.

Some summer problems, like sunburn and heatstroke, are common. Others are rare -- think bears and sharks! WebMD helps you prepare.

In this WebMD slideshow, you’ll learn the good, the bad, and the ugly about your body -- including some fascinating facts you’ll wish you never knew.

WebMD's 2014 Health Heroes awards, hosted by Robin Roberts, recognized celebrities, doctors, researchers, and leaders including Michael J. Fox; Martha Stewart; Carson Daly; Harold S. Koplewicz, MD; Frank Papay, MD; and Zarin Ibnat Rahman.

Should you go gluten-free? Is drinking tap water safe? Which is worse for you: real sugar or high fructose corn syrup? Do vaccinations cause autism? Get answers to today’s biggest health questions.

See pictures of the Ebola virus and learn about the causes, symptoms, treatment, and prevention in this WebMD slideshow.

Sepsis is an extreme reaction to an infection that can -- if untreated -- be deadly. Learn more about the symptoms and treatments for sepsis.