Though rarely serious, dark circles under the eyes can give the appearance of being tired all the time. Many factors affect their appearance.

Journal of Clinical and Aesthetic Dermatology

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Woman looking eye bags

Game over

Tired middle age woman rubbing eyes

Dehydrated woman reaching a glass of water

Summer brings out the most smiles

Looking sharp!

Depressed businesswoman rubbing eyes in office

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Anatomy

<div class="" data-block="true" data-editor="8v4h4" data-offset-key="1smsj-0-0">
<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="1smsj-0-0"><span data-offset-key="1smsj-0-0">Anatomy is a branch of biology. This branch of science in particular deals with organisms and their biological structure. Human anatomy, along with physiology and biochemistry, forms the basis of medicine.</span></div>
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<div class="" data-block="true" data-editor="8v4h4" data-offset-key="e054a-0-0">
<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="e054a-0-0"><span data-offset-key="e054a-0-0"> </span></div>
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<div class="" data-block="true" data-editor="8v4h4" data-offset-key="8jihb-0-0">
<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="8jihb-0-0"><span data-offset-key="8jihb-0-0">Some parts that make up the body's structure are </span><span class="adverb"><span data-offset-key="8jihb-1-0">incredibly</span></span><span data-offset-key="8jihb-2-0"> complex. Take the circulatory system, for example, which contains the heart and blood vessels. This system </span><span class="complexword"><span data-offset-key="8jihb-3-0">handles a lot of responsibility.</span></span><span data-offset-key="8jihb-4-0"> many crucial functions. It transports blood, nutrients, waste products, immune cells, and clotting cells. It is also </span><span class="adverb"><span data-offset-key="8jihb-5-0">closely</span></span><span data-offset-key="8jihb-6-0"> tied to the lymphatic system and our immune system. </span></div>
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<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="8jihb-0-0"><span data-offset-key="8jihb-6-0">As you can see, no one part of our anatomy functions completely separate from the others. </span>All the parts of the structure must get along in order for the body to function.</div>
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General Interest

Why Do I Have Dark Circles Under My Eyes?

9. Smoking

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