Quit-smoking basics
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Ruptured eardrum (perforated eardrum)
A ruptured eardrum is a hole or tear in your eardrum, the thin tissue that separates your ear canal from your middle ear.
Video: Smoking — Anatomy of nicotine addiction
This animation illustrates how smoking changes your brain, causing nicotine addiction.
Atrioventricular canal defect
This congenital heart defect involves a hole in the heart. It affects blood flow through the heart valves. Learn the symptoms and how it's treated.
Patent foramen ovale
Learn more about the causes and complications of this condition in which a hole in the heart doesn't close the way it should after birth.
Airplane ear
That fullness in your ear when on an airplane that's climbing or descending results from uneven air pressure between your middle ear and the environment.
Child abuse
Child abuse includes physical, sexual, emotional and medical abuse, as well as neglect. Learn about signs, risk factors, how to get help and prevention.
Febrile seizure
These frightening but generally harmless seizures are triggered by a fever and affect infants and young children.
Cigar smoking: Safer than cigarette smoking?
Despite what you might think, cigars aren't that different from cigarettes. Like cigarettes, cigars contain nicotine, tobacco and cancer-causing chemicals.
Toddler speech development: What's typical for a 2-year-old?
A Mayo Clinic specialist describes typical speech development between the ages of 2 and 3.
Hookah smoking: Is it safer than cigarette smoking?
This habit isn't safer than smoking cigarettes. Find out why.
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