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Every page here comes from the clinical unit that handles the condition — not from a content desk. Read what a diagnosis means, what a treatment involves and what to expect afterwards, in plain language.

  • 2,309 pages of medical content
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2,309 results

Nephrotic Syndrome

Nephrotic syndrome is a kidney disorder in which the kidneys leak too much protein into the urine, causing swelling, low…

  • 12 doctors
  • 7 answers

Nephrotoxicity

Nephrotoxicity is kidney damage caused by a substance toxic to the kidneys, most often medicines such as NSAID painkillers, certain…

  • 6 doctors
  • 7 answers

Netherton Syndrome

Netherton syndrome is a rare inherited skin disorder caused by changes in the SPINK5 gene. It causes red, scaly skin…

  • 7 answers

Neuroblastoma

Neuroblastoma is a cancer that develops from immature nerve cells, most often in the adrenal glands or along the spine,…

  • 12 doctors
  • 7 answers

Neurodegenerative Diseases

Neurodegenerative diseases are long-term conditions in which nerve cells in the brain or spinal cord gradually stop working and die,…

  • 12 doctors
  • 7 answers

Neuroendocrine Tumors

Neuroendocrine tumors are uncommon growths that arise from hormone-producing neuroendocrine cells and can develop in organs such as the pancreas,…

  • 12 doctors
  • 7 answers

Neurofibromatosis

Neurofibromatosis is a genetic condition that causes tumors to grow along nerves and can also affect the skin, bones, eyes,…

  • 12 doctors
  • 7 answers

Neurogenic Bladder

Neurogenic bladder is a loss of normal bladder control caused by nerve or brain disorders, which can lead to urinary…

  • 12 doctors

Neuroinfectious Diseases

Neuroinfectious diseases are infections of the brain, spinal cord, their protective membranes, or nerves caused by bacteria, viruses, fungi, or…

  • 12 doctors
  • 7 answers

Neuromuscular Diseases

Neuromuscular diseases are a group of conditions that disrupt communication between nerves and muscles, causing weakness, wasting, cramps, or numbness.…

  • 12 doctors
  • 7 answers

Neuropathic Pain

Neuropathic pain is pain caused by injury or dysfunction in the nerves or nervous system, often felt as burning, shooting,…

  • 12 doctors
  • 7 answers

Neurosarcoidosis

Neurosarcoidosis is sarcoidosis affecting the nervous system, where clusters of inflammatory cells called granulomas form in the brain, spinal cord,…

  • 12 doctors
  • 7 answers

Neutropenia

Neutropenia is a condition in which the blood has too few neutrophils, a type of white blood cell that helps…

  • 12 doctors

Nocturnal Enuresis

Nocturnal enuresis is involuntary bedwetting during sleep, usually in children, and it is managed by identifying contributing factors and using…

  • 3 doctors
  • 7 answers

Non-Alcoholic Fatty Liver Disease

Non-alcoholic fatty liver disease is a condition in which excess fat builds up in the liver in people who drink…

  • 12 doctors
  • 7 answers

Non-Hodgkin Lymphoma

Non-Hodgkin lymphoma is a group of cancers that begin in the lymphatic system, usually affecting lymphocytes in lymph nodes, bone…

  • 12 doctors
  • 7 answers

Nonketotic Hyperglycinemia

Nonketotic hyperglycinemia is a rare inherited metabolic disorder in which a faulty enzyme system cannot break down the amino acid…

  • 7 answers

Normal Pressure Hydrocephalus

Normal pressure hydrocephalus is a condition in which excess cerebrospinal fluid enlarges the brain’s ventricles and can cause walking difficulties,…

  • 12 doctors
  • 7 answers

Nosebleed

A nosebleed is bleeding from the lining of the nose, usually caused by dryness, irritation, injury, infection, or underlying health…

  • 1 doctors

Nystagmus

Nystagmus is a condition in which the eyes make repetitive, uncontrolled movements, usually side to side but sometimes up and…

  • 4 doctors
  • 7 answers

Obesity

Obesity is a chronic condition in which excess body fat can affect overall health and raise the risk of problems…

  • 12 doctors

Obsessive Compulsive Disorder

Obsessive compulsive disorder (OCD) is a long-term mental health condition marked by unwanted, repeated thoughts (obsessions) and repetitive behaviors or…

  • 12 doctors
  • 7 answers

Obstructive Sleep Apnea

Obstructive sleep apnea is a sleep-related breathing disorder in which the upper airway repeatedly narrows or collapses during sleep, causing…

  • 12 doctors
  • 7 answers

Occupational Lung Disease

Occupational lung disease is a group of breathing disorders caused by long-term exposure to harmful dusts, chemicals, fumes, or fibers…

  • 5 doctors
  • 7 answers
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