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Learn about how loudness is measured and when you need hearing protection.

Physical inactivity is just as big a risk factor for heart disease as high blood pressure and smoking are. So, be the exception rather than the rule. Read on for some great ways to exercise for a healthier heart.

People with tinnitus hear a constant ringing in their ears. Learn more about this condition, including causes and treatment.

If you're having sex, or thinking about having sex, you need to know about sexually transmitted diseases or STDs. STDs can cause serious health problems. And not all can be cured. But there are ways to protect yourself and others.

Chlamydia is an STI (sexually transmitted infection) that spreads when body fluids are passed during sex. Signs of chlamydia are often absent or hard to notice. Chlamydia can be cured.

Gonorrhea is a sexually transmitted infection (STI). It spreads when body fluids are passed during sex. Infections can occur in the genitals, anus, and throat. You may have no symptoms. Or symptoms can be mild to very painful.

HPV (human papilloma virus) spreads through skin contact. Some types of HPV cause genital warts. Other types put females at higher risk of cancer of the cervix. HPV is very common in all people. And it can't be cured. But there are treatments to remove warts. Tests can also help spot warning signs of cervical cancer.

Mastoidectomy and meatoplasty are types of ear surgery. Mastoidectomy removes part of the mastoid bone (the large bone behind the earlobe). Meatoplasty makes the opening into the ear canal (meatus) larger.

A middle ear infection occurs behind the eardrum and is most often caused by a virus or bacteria. Learn more about this condition.