Health Topics from "N" to "O"

N

  • Narcolepsy - Rare sleep disorder characterized by uncontrollable episodes of falling asleep at any place or time.
  • Nasal polyps - non-malignant growths in the nasal cavities, usually in both sides of the nose.
  • Nasal septum, deviated - Crookedness or other abnormality of the septum, the structure dividing the nose in 2 equal parts.
  • Nausea and Vomiting - Nausea is usually described as queasy, unpleasant sensations in the stomach leading to the urge to vomit.
  • Nephritis, Interstitial - is an inflammation of the connective tissue of the kidney.
  • Nephrotic syndrome - a form of chronic kidney disease beginning in childhood.
  • Nystagmus - is an uncontrollable (involuntary), repetitive, rhythmic movement of the eyes.
  • Nevi - Collections of pigmented cells called melanocytes that appear on skin. Most are present on the torso but are also commonly found on the face, arms and legs.
  • Nosebleed - Loss of blood through the nose. Excessive nose picking is a common cause of nosebleeds in children.

O

  • Obesity - A condition of excess body weight. May be defined as over 25% body fat in females and over 20% body fat in males.
  • Obsessive-compulsive disorder - disorder characterized by recurrent, intrusive thoughts and repetitive, ritualistic behaviors.
  • Optic neuritis - is an inflammation of the optic nerve causing sudden visual loss in part of the visual field.
  • Osteoarthritis - Degeneration of cartilage at a joint and growth of bone "spurs" that inflame surrounding tissue.
  • Osteomyelitis - Infection of the bone and bone marrow. It can involve any bone in the body.
  • Osteoporosis - Loss of normal bone density, mass and strength, leading to increased thinning and vulnerability to fracture.
  • Oral cancer - Cancer of the mouth, lip and/or oropharynx (part of the throat at the back of the mouth). Most begin in the tongue and in the floor of the mouth.
  • Osgood-schlatter disease - Inflammation of the tendon where the kneecap meets the top of the shinbone (patellar tendon). It causes swelling and tenderness.
  • Ovarian cancer - Cancer that begins in the cells that compose the ovaries, including surface epithelial cells, germ cells, and the sex cord-stromal cells.

Drugs

O

  • Orlistat - acts in the stomach and small intestine to prevent the absorption of up to one-third of the dietary intake of fat.
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