Medical

You are allergic to something if your body has a bad reaction to it. Allergic reactions can include getting a rash, sneezing, getting watery eyes or having difficulty breathing.

People are often allergic to dogs or cats, pollen or insect stings.

A bandage is a long, thin strip of fabric that you wrap around a part of your body that is hurt. You often see people who have a sprained ankle with a bandage wrapped around it.

A black eye is an injury that looks worse than it really is. A black eye, or shiner, can be caused by any damage near the eye or eyebrow. Even a small bump or knock can cause a spectacular black eye.

You bleed when you lose blood from where it is supposed to be. When you cut yourself, you bleed. A bruise forms when you bleed inside, and the blood makes a dark patch under your skin.

A blister is a kind of fluid-filled bubble under your skin. You get blisters from shoes that rub and from being burnt.

Anything that looks like a blister can be described the same way, for example tablets that are sold in blister packs.

Your eyes are bloodshot if you can clearly see the blood vessels in them. You get bloodshot eyes when you are very tired, dehydrated, have conjunctivitis, or if your eyes have been damaged by something.

You breathe when you draw air into your lungs through your nose or mouth, and then back out again. Breathing in is inhaling and breathing out is exhaling.

When you fall and hurt yourself or hit yourself hard on something else, you often get a dark purple or blue bruise. A bruise happens when the blood vessels under your skin get broken and you bleed under your skin. Bruises can take several days to go away.

A cast is a hard shell usually made from plaster-soaked bandages. Casts are used to hold a broken bone in place while it heals.

A chiropractor is someone who manipulates the bones and muscles in your body. These manipulations can help restore balance in the body and make you feel better.