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When you yawn or swallow, the eustachian tubes open briefly and make the air pressure equal inside and outside the ears. The

A Baker's cyst is a pocket of joint fluid that forms a lump behind the knee. It is also called a popliteal cyst.

Mitral valve regurgitation happens when the mitral valve does not close tightly enough after blood flows through the valve into

Bedbugs are flat, wingless insects that feed on blood from animals or people. The bugs are about 0.25 in. (0.6 cm) long and range

The lingual frenulum is a band of tissue under the tongue that connects the tongue to the bottom of the mouth.

Unlike other breast cancers, inflammatory breast cancer may not cause a lump in the breast. Instead, it may cause the breast to be

Goiter is an enlargement of the thyroid gland. It can be caused by many things, including nodules, inflammation, and Graves'

Areas affected by the nerves in the hand This picture shows the main nerves of the hand and the areas of skin that get feeling

A broken nose is likely to cause swelling and bruising over the nose and around the eyes. The nasal bones may break in the area

A rectal thermometer is the most accurate way to take a temperature. To take a rectal temperature: Apply a lubricant jelly or