These types of injuries affect the nerves that link the brain and spinal cord to nerves in other parts of the body.
Disease
Peripheral nerve tumors
Learn about these growths that form in or near nerves connecting to the spinal cord. Surgery is the most common treatment.
Disease
Peripheral neuropathy
Learn what may cause the prickling, tingling or numb sensations of nerve damage and how to prevent and treat this painful disorder.
Disease
Peritoneal carcinomatosis
This cancer usually starts in another organ and then spreads to the abdominal lining. Learn about symptoms and treatment options, including newer approaches that may offer more hope.
Disease
Peritonitis
Learn about the causes, symptoms and treatment of peritonitis.
Disease
Persistent depressive disorder
This type of depression may cause you to feel sad and empty and to lose interest in life. You may feel like a failure. These feelings may last years.
Find out what to do when symptoms such as headache, fatigue and dizziness last longer than expected after an injury causes a concussion.
Disease
Personality disorders
A person with this mental health condition thinks, acts and behaves in a rigid pattern that's not healthy. It's hard to understand and relate to others.
Disease
Pet allergy
Family pet making you sneeze? Find out about diagnosis, treatment and handy household tips for relieving bothersome pet allergy symptoms.
Disease
Peyronie disease
Understand what causes bent and painful erections and learn what treatments are available.
Disease
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.
Disease
Pheochromocytoma
Find out more about the symptoms, causes and treatment of this rare adrenal gland tumor, which usually is not cancer.