Browse our Health Library to learn about treatments, conditions, and how Cedars-Sinai can support your healthcare needs.
Detailed information on periodontal disease, including types, symptoms, causes, and treatment
Peripheral neuropathy is a type of damage to the nervous system.
Peripheral vascular disease (PVD) is a slow and progressive circulation disorder caused by narrowing, blockage or spasms in a blood vessel.
Peritonitis is a redness and swelling (inflammation) of the tissue that lines your belly or abdomen. This tissue is called the peritoneum.
Periventricular leukomalacia (PVL) is a softening of white brain tissue near the ventricles. The ventricles are fluid-filled chambers in the brain.
Persistent depressive disorder is a type of depression. A child with this disorder has a low, sad, or irritable mood for at least 1 year.
Persistent pulmonary hypertension (PPHN) happens in newborn babies. It occurs when a newborn’s circulation changes back to the circulation of a fetus. When this happens, too much blood flow bypasses the baby’s lungs. This is sometimes ...
Peyronie disease causes hard, flat plaque to form under the skin on the tissue of the penis. The plaque often starts as an inflammation that may develop into scar tissue. It can cause pain and a sharp curve in the penis during erections.
PFAPA (Periodic Fever, Aphthous Stomatitis, Pharyngitis, Adenitis) is a childhood syndrome that affects both boys and girls. It causes repeated episodes of fever, mouth sores, sore throat, and swollen lymph nodes. PFAPA usually starts in...
Pharyngitis and tonsillitis are infections that cause inflammation. If the tonsils are mainly affected, it is called tonsillitis. If the throat is mainly affected, it is called pharyngitis. These infections are spread by close contact ...
Pharyngitis is redness, pain, and swelling of the throat (pharynx). Tonsillitis is inflammation of the tonsils. The tonsils are a pair of tissue masses on either side of the back of the throat. They are part of the immune system, the ...
Phenylketonuria (PKU) is a rare metabolic disorder. Children with PKU can't process an amino acid called phenylalanine. Phenylalanine is in many common foods.
Pheochromocytoma is a tumor of the adrenal glands. The tumor makes hormones called epinephrine and norepinephrine. This leads to an excess of the hormones in the body. These hormones help manage heart rate and blood pressure, and they ...
A pheochromocytoma is a rare type of tumor. It grows in the middle of an adrenal gland. A pheochromocytoma causes the adrenal glands to make too much of the hormones epinephrine and norepinephrine. These hormones help keep your heart ...
Phimosis and paraphimosis are problems with the foreskin of the penis. Phimosis is when a foreskin can’t be pulled down (retracted) from the tip of the penis. Paraphimosis is when the foreskin is retracted but can’t move back up.
A phobia is an excessive fear of an object or situation. It's a fear that lasts for at least 6 months. It is a type of anxiety disorder. Here's what you need to know.
Pilocytic astrocytoma (PA) is a slow-growing type of brain tumor. These tumors are often benign or noncancerous. This means that the growth doesn't spread to other parts of the body.
A pilomatrixoma (PEE-lo-may-trick-SO-mah) is a slow-growing, hard lump found under the skin. It is most common on the face and neck, but it may be on other parts of the body. A pilomatrixoma is usually a single lump, but occasionally, ...
A pilon fracture is a type of break of the shinbone (tibia) that happens near the ankle. Most of the time, it involves breaks in both the tibia and fibula of the lower leg. The lower ends of these bones make up part of the ankle.
Radiculopathy, commonly called pinched nerve, often occurs in the lower back.
A pineal tumor is a tumor of the pineal gland in your brain.This gland secretes a substance called melatonin that affects your sleep-wake cycles. These are very rare tumors. They happen most often to children and adults younger than 40.
Most pituitary tumors are not cancer (benign). But they can cause the pituitary to make too few or too many hormones, causing problems in the body. Here's what you should know.
Detailed information on pityriasis rosea, including causes, symptoms, diagnosis, and treatment
Pityriasis rosea is a mild, common rash. It causes the skin to become scaly, pink, and inflamed. The rash can last from 1 to 3 months and usually leaves no lasting marks. This rash is not contagious.
Bleeding can happen at any time during pregnancy. Placenta previa can cause bleeding late in pregnancy. This means after about 20 weeks.
Bleeding can happen at any time during pregnancy. Placental abruption can cause bleeding late in pregnancy. This means after about 20 weeks.
Plantar fasciitis is one of the most common causes of pain in the bottom of the heel, the arch or both areas. The condition comes on with inflammation of the plantar fascia, a ligamentlike band on the bottom of the foot.
Pneumococcal disease is a serious illness that can affect your lungs. Getting the vaccine can lower your chances of getting this illness. This video tells you more about the vaccine and who should get it.
Pneumocystis pneumonia or PCP is a fungal infection in one or both lungs. It is common in people who have a weak immune system, such as people who have AIDS.