In-depth

Acute sinusitis

Acute sinusitis occurs when your sinus cavities become inflamed. Antibiotics, decongestants and corticosteroids may relieve pain and congestion and prevent development of chronic sinusitis.

Behcet's disease

Behcet's disease affects several body systems and causes a variety of signs and symptoms. Find out what it is and how it's treated.

Blocked tear duct

Blocked tear ducts are common at birth, but tear ducts can also become blocked in adulthood by infection or trauma. Treatment is almost always successful.

Brain aneurysm

A brain aneurysm is a bulge in an artery in the brain. A ruptured aneurysm causes bleeding in the brain and potentially fatal cell damage.

Dengue fever

Dengue fever is a sometimes fatal viral disease spread by mosquitoes in tropical and subtropical areas of the world. Learn how to protect yourself.

Dry socket

Dry socket, a painful complication of tooth extraction, results from improper healing of the surgical wound.

Entropion

Entropion occurs when your eyelid turns inward so that eyelashes rub against the eye. Surgery is usually necessary to relieve symptoms and prevent cornea damage.

Eyestrain

Reduce eyestrain by following these simple tips.

Glaucoma

Glaucoma is a group of eye conditions that, left untreated, can seriously damage your optic nerve and lead to blindness.

Gonorrhea

Gonorrhea is a highly contagious sexually transmitted infection. Without treatment, serious complications can occur.

Iritis

Iritis is inflammation that affects the colored area of your eye called the iris. This serious condition can affect your vision if left untreated.

Keratitis

Keratitis is an inflammation of the cornea — the clear, dome-shaped tissue on the front of your eye that covers the pupil and iris.

Optic neuritis

Optic neuritis is an inflammation of the optic nerve, the structure that transmits visual information to your brain. Optic neuritis usually causes temporary vision loss.

Sarcoidosis

Sarcoidosis starts in your lungs but can cause inflammation in any part of your body. It can last a lifetime, or disappear in a few years.

Trachoma

Trachoma is the leading infectious cause of blindness worldwide. It's particularly devastating in countries where sanitation isn't reliable.

Trigeminal neuralgia

Trigeminal neuralgia is a very painful condition of a large nerve that provides sensation to most of your face. Treatment involves medications and, sometimes, surgery.

Tularemia

Tularemia is a rare, highly infectious disease spread by insects and wild animals. Landscapers, hunters and laboratory workers are especially at risk.

Uveitis

Uveitis — inflammation of the eye is a serious condition that can lead to vision loss if not treated promptly.

Wegener's granulomatosis

Wegener's granulomatosis is an uncommon disease that causes blood vessel inflammation that can damage lungs, kidneys and other organs. Untreated, it can be fatal.

West Nile virus

West Nile virus infection usually resolves on its own, but occasionally it can be serious.

Mar. 01, 2013