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Articles In This Section

• Word! Hypothermia

  Hypothermia is when the body gets so cold that it can't warm itself up again.

• Word! Hyperventilate

  When you hyperventilate, you breathe too deeply and too quickly. This can make you feel lightheaded or short of breath.

• Word! Hydrocephalus

  Hydrocephalus happens when the fluid that cushions the brain builds up inside the head.

• Word! Hives

  Hives are pink or red bumps or slightly raised patches of skin that can appear due to an allergic reaction.

• Word! Herpes Zoster

  Herpes zoster, also called shingles, causes a rash with blisters on the body and is very painful.

• Word! Hemophilia

  People with hemophilia have blood that doesn't clot the way it should. That means that they bruise and bleed easily.

• Word! Hearing Loss

  Hearing loss happens when one or more parts of your ears don't work and you can't hear perfectly.

• Word! Headache

  Most headaches happen in the nerves, blood vessels, and muscles that cover your head and neck.

• Word! Hand, Foot, and Mouth Disease

  Hand, foot, and mouth disease can cause fever and blisters on the hands and feet and in the mouth and throat.

• Word! Hypoglycemia

  Glucose (a type of sugar) is the body's main energy source. Hypoglycemia occurs when the levels get too low.

• Word! Hyperglycemia

  Glucose (a type of sugar) is the body's main energy source. Hyperglycemia occurs when the levels get too high.

• Word! Hormones

  Hormones are special chemicals your body makes to help it do certain things - like grow up!

• Word! Hematoma

  Hematoma is just a fancy name for bruise, or black and blue mark.

• Word! Histamine

  Histamine is a substance in the body that's released during an allergic reaction.

• Word! Hemangioma

  This is a big word for a type of birthmark.

• Word! Hydrogen Peroxide

  Hydrogen peroxide is a chemical that can clean your cuts and scrapes.

• Word! Hyperopia

  Having hyperopia is also known as being farsighted, which means you can see things far away, but have trouble seeing objects up close, like the words in a book.

• Word! Humidifier

  If you get nosebleeds a lot or your nose often feels dry, it may be time to get a humidifier.

• Word! Hydrocortisone

  Hydrocortisone is medicine that helps itchy skin feel better.

• Word! Hormone

  Hormones are special chemicals your body makes to help it do certain things - like grow up!

• Word! Heredity

  If people say you look like your parents, they're probably talking about heredity.

• Word! Heat Exhaustion

  Super hot in summer? Then watch out for this.

• Word! Hay Fever

  No, hay fever's not when a horse is sick!