Learn what may cause this change in mental abilities. Symptoms develop fast and include confusion and being unaware of surroundings.
Disease
Hydrocephalus
Learn about this potentially fatal condition that causes fluid buildup in the brain. It can cause a range of symptoms, from headaches to poor balance.
Disease
Ocular rosacea
Learn about symptoms, causes and treatments of ocular rosacea — an eye condition that often affects people who have skin rosacea.
Disease
Sjogren's syndrome
If you're bothered by dry eyes and mouth, talk to your doctor about whether you have the autoimmune condition Sjogren's syndrome.
Disease
Meniere's disease
This chronic disorder affects balance and hearing, causing unpredictable episodes of dizziness and hearing problems.
Disease
Dystonia
Find out more about this painful movement disorder and ways to improve muscle function.
Disease
Behcet disease
This rare condition causes blood vessel swelling throughout the body. Symptoms depend on which parts of the body the condition affects.
Disease
Pituitary tumors
Learn more about the symptoms, causes and treatment of growths that develop in the pituitary gland.
Disease
Burning mouth syndrome
This burning sensation, without an obvious cause, may affect the tongue, gums, lips, cheeks, roof of your mouth or large areas of your mouth.
Disease
Periodontitis
This serious gum infection damages the soft tissue and can destroy the bone that supports your teeth. It can cause teeth to loosen or lead to tooth loss.
Disease
Geographic atrophy
This serious eye condition can occur in people with macular degeneration. Find out about its symptoms and treatments.
Disease
Hypereosinophilic syndrome
Hypereosinophilic syndrome (HES) is a disorder of certain white blood cells that can cause life-threatening damage to your organs.