A blinding flash of light is one of many effects of flashbang grenades

How do flashbangs work?

Mar 11, 2020

The noise and the bright light.

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A man with a lingering cough.

When your cough won’t go away

Jan 07, 2020

Why won't it stop?

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A woman uses a heater. She doesn't want a nosebleed.

Does heat cause nosebleeds?

Dec 04, 2019

Hot and dry.

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A broken blood vessel in the eye.

What causes a broken blood vessel in the eye?

Oct 23, 2019

Are they painful?

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A negative version of the American flag. Visuals like this can be a persistent afterimage in eye

Why do I see afterimages?

Oct 18, 2019

Why the images stay.

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A woman with eye pressure that may be glaucoma

Why is there pressure behind my eye?

Aug 20, 2019

Learn the many possible causes of eye pressure, including glaucoma and sinus infections.

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