Sudden, extreme fatigue can occur for a variety of reasons, including infection, severe stress, dietary issues, autoimmune disease, anemia, and certain medications.

Laryngitis is a common condition that many people may experience at some point in their lives, but it is often misunderstood.

Every day, Davida Wynn sets herself one task: Take a bath. Or wash the dishes. Or make an elaborate meal. By the end of the chore, she is exhausted and has to sit or lie down, sometimes falling asleep ...

University of Manchester biologists have for the first time started to unpick the long-term biological changes associated ...

Brain fever, a term for serious infections causing brain inflammation like meningitis and encephalitis, can lead to severe ...

Herpes simplex virus-1 (HSV-1) is a common virus; the World Health Organization has estimated that as many as two-thirds of people worldwide who are under age 50 may be infected. HSV-1 can spread ...

Viral skin rashes (also known as viral exanthems) can cause itching, irritation, and pain — and possibly symptoms like fever or fatigue. Unlike allergic rashes, which happen when your immune system ...

People may use the term “viral heart disease” to describe viral myocarditis. This refers to when a viral infection causes inflammation of heart muscle tissue. Inflammation is the body’s natural ...

The vast majority of sinus infections are caused by viruses and should not be treated with antibiotics, suggest new guidelines released by the Infectious Diseases Society of America. Although sinus ...

Spinal meningitis, more commonly known as meningitis, is inflammation of the meninges, the membranes surrounding the brain and spinal cord. It is a serious and potentially life threatening condition.