Have you noticed — yet — having to hold books at arm's length to read them? Find out what options are available when it happens.
Disease
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.
Disease
Preterm labor
Going into labor before the due date is serious, but knowing the risk factors and how to manage them can help.
Disease
Priapism
Understand the symptoms, possible causes and treatment of prolonged erection of the penis, including when to seek emergency care.
Disease
Primary biliary cholangitis
Primary biliary cholangitis is a type of liver disease that damages the bile ducts. Early recognition and treatment may help prevent complications.
Disease
Primary immunodeficiency
Frequent infections could mean that you have an immune system disorder. The conditions in this category are usually caused by genetic changes.
Disease
Primary lateral sclerosis (PLS)
This motor neuron disease causes nerves within the brain to slowly break down. It causes muscle weakness primarily in the legs, arms and tongue.
Disease
Primary ovarian insufficiency
This condition, also called premature ovarian failure, happens in women under age 40. Hormone therapy can lessen symptoms.
Disease
Primary progressive aphasia
Find out more about this type of dementia that affects the speech and language areas of the brain.
Disease
Primary sclerosing cholangitis (PSC)
Scarring in the bile ducts blocks the flow of bile from the liver and damages liver tissue. A liver transplant is the only known cure.
Disease
Proctitis
Inflammation of the rectal lining can cause pain, bleeding and diarrhea. This condition can be a treatment side effect or part of a more generalized disease.
Disease
Progeria
This genetic disorder is extremely rare and progressive. It causes children to age rapidly, beginning in their first two years of life.