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Overview Amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig’s disease, is a progressive degeneration of nerve cells that control muscle movements. The disease, the most common motor neuron disease among adults, became known as Lou Gehrig’s disease after the New York Yankee’s Hall of Fame first baseman. Gehrig’s career …

Definition Anosmia is the full loss of smell. Anosmia can be a temporary or permanent condition. You can partially or completely lose your sense of smell when the mucus membranes in your nose are irritated or obstructed such as when you have a severe cold or a sinus infection, for …

What is Anal Itching? Anal itching (known medically as pruritus ani) is irritation of the skin at the opening of the anal canal through which stool exits the body that leads to itching. The skin surrounding the opening is known as the anus. The itching is accompanied by the desire …

Overview Aseptic meningitis is an illness characterized by serous inflammation of the linings of the brain (i.e., meninges), usually with an accompanying mononuclear pleocytosis. Clinical manifestations vary, with headache and fever predominating. The illness is usually mild and runs its course without treatment; however, some cases can be severe and …

What is an anal fissure? An anal fissure is a tear in the lining of the lower rectum (anal canal) that causes pain during bowel movements. Anal fissures don’t lead to more serious problems. Most anal fissures heal with home treatment after a few days or weeks. These are called …

Introduction Adenoviruses (Adenovirus infection) are a group of common viruses that infect the lining of your eyes, airways and lungs, intestines, urinary tract, and nervous system. They’re common causes of fever, coughs, sore throats, diarrhea, and pink eye. Infections happen in children more often than in adults, but anyone can …

Description – Atrial Fibrillation Atrial fibrillation is an irregular and often rapid heart rate that can increase your risk of strokes, heart failure, and other heart-related complications. During atrial fibrillation, the heart’s two upper chambers (the atria) beat chaotically and irregularly — out of coordination with the two lower chambers …

Definition Anthrax, also called malignant pustule or woolsorters disease, acute, infectious, febrile disease of animals and humans caused by Bacillus anthracis, a bacterium that under certain conditions forms highly resistant spores capable of persisting and retaining their virulence for many years. Although it is most commonly affects grazing animals such …