What Is Chlamydia? Chlamydia (kluh-MID-ee-uh) is a common, curable sexually transmitted disease (STD). Treatment can stop the spread of the infection and help prevent long-lasting problems. What Are STDs? STDs (also called sexually transmitted infections or STIs) are infections that spread through sex (vaginal, oral, or anal). Some STDs can spread through close contact with the …

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Acanthosis Nigricans

What Is Acanthosis Nigricans? Acanthosis nigricans (ah-kan-THO-sis NY-gruh-kans) is a skin condition. It causes thicker and darker patches or streaks, usually in skin creases and folds, such as the sides and back of the neck, armpits, elbow pits, and groin. But it can show up anywhere on the body. It may look velvety or warty, …

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5 Things to Know About Zika and Pregnancy

Zika is a virus that a person can catch through the bite of an infected mosquito. Outbreaks of the virus have happened throughout the world, particularly in tropical areas where certain types of mosquitoes live.  Women who are pregnant — or who are considering becoming pregnant — may be worried about the Zika virus. The virus …

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Athlete’s Foot

What Is Athlete’s Foot? Athlete’s foot is a type of fungal skin infection. Fungi (the plural of fungus) are microscopic organisms that thrive in damp, warm environments. They’re usually not dangerous, but sometimes can cause disease. When they infect the skin, they cause mild but annoying rashes. Fungal skin infections are also known as tinea infections. …

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Pinkeye (Conjunctivitis)

What Is Pinkeye? The eye infection conjunctivitis (kun-junk-tih-VY-tus) — often called pinkeye — is common in young kids. It’s usually contagious, and breakouts can sweep through preschools and playgrounds. But even teens and adults can get pinkeye. Pinkeye is an inflammation of the conjunctiva, the white part of the eye and the inner eyelids. It’s a minor infection …

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What Is Bronchitis? Bronchitis is when the lining of the large breathing tubes get inflamed (swollen and red). These airways, called the bronchial tubes, connect the windpipe to the  lungs. Their delicate lining makes mucus, and covers and protects the organs and tissues involved in breathing. Bronchitis (brong-KYE-tis) can: Make it hard for air to pass …

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