Elastic resistance
Learning Center
Painful intercourse (dyspareunia)
Pain during sex can happen for many reasons, ranging from physical conditions to emotional concerns. Medicines or other therapies may help.
Phenylketonuria (PKU)
PKU is caused by a change in the gene that helps create an enzyme needed to break down phenylalanine. Treatment includes a special diet and medication.
Reye's syndrome
Learn about the causes and treatment of this rare but serious condition causing swelling in the liver and brain.
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.
Rhabdomyosarcoma
This rare soft tissue cancer affects children more often than adults. Treatment may include surgery, chemotherapy and radiation therapy.
Rumination syndrome
Learn about this condition that results in regurgitating and reswallowing food. Behavioral therapy and medicine are treatments.
Rectal prolapse
This rare condition happens when the rectum slips outside of the anus. Find out about symptoms and treatment.
Tricuspid valve regurgitation
A leaky tricuspid valve may make you feel tired and have difficulty exercising. Learn how this type of heart valve disease is diagnosed and treated.
Brachial plexus injury
Learn about these nerve injuries that usually result from auto or motorcycle accidents, and find out which procedures can help restore arm function.
Brain AVM (arteriovenous malformation)
Tangled blood vessels in the brain affect typical blood flow in this rare condition. Learn more.
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