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Learning Center
Rectal prolapse
This rare condition happens when the rectum slips outside of the anus. Find out about symptoms and treatment.
Raynaud's disease
Learn how this disease causes parts of the body, mainly fingers and toes, to feel cold and numb and possibly change colors from cold temperatures or stress.
Radiation therapy
Radiation therapy is a common means of treating many types of cancer. Find out what to expect during your radiation therapy treatment.
Pulmonary valve stenosis
When the valve between the heart and lungs is narrowed, blood flow slows. Know the symptoms of this type of valve disease and how it's treated.
Pulmonary valve repair and replacement
A congenital heart defect can cause a leaky or blocked pulmonary valve. Know the symptoms and how it's treated.
Puberty blockers for transgender and gender-diverse youth
Understand how puberty blockers work to suppress puberty. Learn about their benefits, side effects and long-term effects.
Pseudotumor cerebri (idiopathic intracranial hypertension)
Headaches and vision loss can result from this increased pressure inside your brain that occurs with no obvious reason.
Pseudocholinesterase deficiency
This causes sensitivity to certain muscle relaxants used during anesthesia. Muscles may stay relaxed for too long, interfering with movement and breathing.
Proton therapy
Learn about this newer form of radiation therapy, used to treat cancer and noncancerous tumors, and how it's different from X-ray radiation.
Prostatitis: Can sexual activity make it worse?
Some men with prostatitis have pain with ejaculation or sexual activity.
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