Health A-Z Medical Reference

Paroxysmal nocturnal hemoglobinuria (PNH) brings challenges that impact work and relationships, like fatigue. Here’s what to know and how to manage.

Bald-faced hornets are large, aggressive wasps. Learn more about the signs of bald-faced hornets, health risks, what to do if you have them, and more.

Daddy longlegs are a common pest found around homes. Learn more about daddy longlegs and what they do in our guide.

Palmetto bugs are large cockroaches that live in the American southeast. Learn more about palmetto bug traits, why you get them, how to get rid of them, and more.

Click beetles are a species of beetle. Learn about the different types, what they look like, and where they live.

Joro spiders are a colorful and invasive species of spiders. Learn more about the signs of Joro spiders, health risks, what to do if you have them, and more.

Cicadas are an insect with a long lifecycle. Learn what they look and sound like, where they live, and when they'll appear next.

Learn about emperor scorpions. Discover how to identify and eliminate emperor scorpion infestations.

Crickets are a singing insect commonly found outside homes in rural landscapes. Find out more about these creatures, what they do, and how to prevent and get rid of them.

Light brown apple moths are invasive pests that damage plants and fruit trees. Learn more about the signs of light brown apple moth, health risks, what to do if you have them, and more.

Rat droppings can carry several dangerous diseases. Learn how to get rid of rats, identify rat droppings, and properly clean them up to reduce the risk of infection.

Bumblebees are a common flying insect found worldwide. Learn more about bumblebees, what to do if you have them, and how to help them from becoming endangered.

Learn more about drain flies, including what they look like, where they live, and how to get rid of them.

Learn more about garden spiders, including signs that you have them and how to identify them.

Crane flies are giant insects that look like mosquitoes. Learn more about health risks, what to do if you have them, and more.

Brown widow spiders are becoming more common in the southern U.S. Learn more about brown widow spiders, where they live, what to do if you get bit, how to get rid of them, and more.

Ants are common household pests. Learn more about the signs of an ant infestation, health risks, what to do if you have them, and more.

Learn about boxelder bugs. Discover how to identify and eliminate boxelder bug infestations.

Bat bugs are tiny insects that can infest a house. Learn more about the signs and health risks of bat bugs, what to do if you have them, and more.

Learn about black fire ants. Discover how to identify and eliminate black fire ant infestations.

Beehives can cause problems if they settle into your home. Learn the signs you have a beehive and how to safely remove them and prevent bees from settling again.

Asian longhorned beetles are an invasive species that burrow into and kill trees. Learn more about the signs of an Asian longhorned beetle infestation, what their life cycle is, and how to get rid of them.

Beetles are the most common insect in the world. Learn more about Beetles, where they live, which ones are harmful, how to get rid of them, and more.

Learn more about what bagworms are, what they look like, and how to get rid of these pests before they destroy your foliage.

Asian lady beetles are native to Eastern Asia, but are found in most U.S. states. Learn how to identify these bugs and what to do if you see them in your house.

Learn about blister beetles. Discover how to identify and manage blister beetle problems.

Weevils are bugs that infest plants and pantry goods. Learn more about their health risks, how to get rid of them, and more.

Looking for a safe, effective pesticide to rid your house of bugs? Borax is a mineral that, with proper precautions, you can use to kill bugs around your home.

Learn how the Rift Valley fever virus can pass from mosquitoes to animals and humans -- and what you can do about it.

Learn about mole removal for your property. Discover the best ways to deal with these outdoor pests.

The Z-track injection method is a more effective way of performing intramuscular injections. Learn the benefits and how to perform one yourself.

Find out what you need to know about whiteflies, and discover strategies to identify and control these pesky insects.

Learn about pill bugs. Discover how to eliminate them when they’re pests and care for them when they’re wanted.

Learn about termite fumigation techniques. Discover whether or not termite tenting is right for your building.

Learn about sweat bees. Discover the size, characteristics, and behaviors of this group of bees.

Dry, inflamed skin is really common after you start dialysis treatment. Here’s what’s going on and what you can do to get relief.

Disease-adjusted life years or DALYs is a universal metric that experts use to measure how certain diseases and disabilities affect a year of healthy life.

Crane flies may look like large mosquitoes, but they don't bite. Learn more about these abundant insects, including their usual habitats and the impact they have on the environment.

Find out what you need to know about Jerusalem crickets, and discover if they are dangerous and how they can affect your health.

Cow killer ants aren't ants, and they aren't cow killers, but these wasps do have a painful sting. Learn more about these wasps and what to watch out for.

Biomarkers are things that doctors measure in your blood, body fluids, and tissues. Doctors use them to understand your overall health.

Collecting rainwater is good for the environment and your yard. Learn how to install and maintain rain barrels and how to safely use the rainwater you collect.

Dressing yourself as a visually impaired person can be challenging. Learn more about how you can successfully dress yourself as a blind person.

Ground eggshells can help your garden plants thrive. Find out how to use eggshells in your garden and how to prepare them for composting.

Bacteriophages, or phages, are viruses that kill certain bacteria. If antibiotics don’t work on your infection, phage therapy may be able to do the job instead.

With beta thalassemia, your body doesn’t make enough hemoglobin, an important protein used by red blood cells. Learn more about it.

La Crosse encephalitis is a rare disease contracted from a mosquito bite. Learn more about the diagnostic process, symptoms, causes, and treatment options.

Find out what you need to know about Capnocytophaga, and discover how it’s transmitted, treated, and prevented, and how it may affect health.

Human Granulocytic Anaplasmosis is a global tick-borne disease that presents mild to severe symptoms in patients. Learn more about the causes, origin, and treatment options of HGA.

Find out what you need to know about deer flies, their life cycle, bites, and more.