Sex and aging
Learning Center
Amenorrhea
Absence of menstruation (amenorrhea) may be linked to an underlying, treatable problem. Learn about amenorrhea causes and when to seek help.
Prescription drug abuse
Using a prescription medicine in a way not intended by the prescriber can lead to drug abuse. Learn about risk factors and treatment for drug misuse.
Reye's syndrome
Learn more about the causes and treatment of Reye's syndrome, a rare but serious condition causing swelling in the liver and brain.
Separation anxiety disorder
Intense or prolonged separation anxiety that interferes with school or other daily activities or includes panic attacks. Learn about treatment.
Lupus nephritis
Learn about this common effect of lupus on the kidneys, including symptoms to watch for, how it's diagnosed and what treatments are available.
How to treat a piercing site infection
Learn what you can do at home if your ear new piercing becomes infected.
Guide to different tick species and the diseases they carry
Learn about different tick species and some of the diseases they may carry.
Congenital myasthenic syndromes
These rare hereditary conditions result in a problem in nerve stimulation, causing muscle weakness that worsens with physical activity.
Esthesioneuroblastoma
This cancer begins in the upper part of the inside of the nose. Treatment usually involves surgery. Other options include radiation therapy and chemotherapy.
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