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.
Disease
Pilonidal cyst
Learn about causes, symptoms and treatments of this painful condition that usually affects the skin above the tailbone in people who sit for long periods.
Disease
Pinched nerve
Pressure on a nerve can lead to numbness, tingling or pain that’s often improved by resting the area.
Disease
Pineoblastoma
Learn about this rare cancer that begins in the brain's pineal gland. Treatments include surgery, radiation therapy and chemotherapy.