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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.

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2,309 results

Oculomotor Nerve Palsy

Oculomotor nerve palsy is weakness or paralysis of the third cranial nerve, which controls most eye movements, the upper eyelid,…

  • 7 answers

Onychomycosis

Onychomycosis is a fungal nail infection that causes thickened, discolored, brittle, or distorted nails and is diagnosed by examining the…

  • 5 doctors
  • 7 answers

Optic Neuritis

Optic neuritis is inflammation of the optic nerve that can cause eye pain, blurred vision, and sudden vision loss, often…

  • 12 doctors
  • 7 answers

Oral Cancer

Oral cancer is a malignancy that develops in the lips, tongue, gums, inner cheeks, floor of the mouth, or palate…

  • 12 doctors

Oral Health And Systemic Diseases

Oral health and systemic diseases refers to the two-way link between conditions in the mouth, especially gum disease, and body-wide…

  • 12 doctors
  • 7 answers

Oral Leukoplakia

Oral leukoplakia is a white patch or plaque in the mouth that cannot be explained by another condition and may…

  • 12 doctors

Oral Thrush

Oral thrush is a fungal infection of the mouth caused by overgrowth of Candida yeast. It causes creamy white patches…

  • 1 doctors
  • 7 answers

Orchitis

Orchitis is inflammation of one or both testicles, usually caused by a bacterial infection such as a sexually transmitted or…

  • 12 doctors
  • 7 answers

Orofacial Pain

Orofacial pain is pain felt in the mouth, jaw, face, or nearby head and neck areas. It is an umbrella…

  • 12 doctors
  • 7 answers

Osteoarthritis

Osteoarthritis is a degenerative joint disease in which cartilage gradually wears down, causing pain, stiffness, swelling, and reduced movement. At…

  • 12 doctors

Osteochondritis Dissecans

Osteochondritis dissecans is a joint condition in which a small area of bone beneath the cartilage loses blood supply, causing…

  • 12 doctors

Osteogenesis Imperfecta

Osteogenesis imperfecta, also called brittle bone disease, is a rare inherited condition in which faulty or insufficient type I collagen…

  • 12 doctors
  • 7 answers

Osteomalacia

Osteomalacia is the softening of bones caused by poor mineralization, most often related to vitamin D deficiency, low calcium or…

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Osteomyelitis

Osteomyelitis is a bone infection, usually caused by bacteria, that can lead to pain, swelling, fever, and bone damage if…

  • 12 doctors
  • 7 answers

Osteoporosis

Osteoporosis is a condition in which bones become weak and more likely to break because bone density and quality decline…

  • 12 doctors
  • 7 answers

Osteosarcoma

Osteosarcoma is a cancer that starts in bone-forming cells, most often in the long bones, and is usually treated with…

  • 12 doctors

Otitis Media

Otitis media is an infection or inflammation of the middle ear that often causes ear pain, pressure, hearing changes, and…

  • 5 doctors
  • 7 answers

Otomycosis

Otomycosis is a fungal infection of the outer ear canal, most often caused by Aspergillus or Candida species. It typically…

  • 6 answers
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