Although the absence of menstruation (amenorrhea) is seldom serious, the condition can often be linked to an underlying problem requiring treatment.
Antiphospholipid syndrome is a rare disorder in which your immune system attacks certain blood proteins, creating clotting abnormalities that can cause stroke and pregnancy complications.
Aplastic anemia occurs when your bone marrow stops producing enough new blood cells. It's a serious problem, but treatments are available.
Many people have astigmatism, an irregular curvature of the eye's surface that can cause blurred vision. Treatments include corrective lenses and laser surgery.
Bee stings — Comprehensive overview covers prevention, treatment of bee stings.
Brucellosis is an infectious disease that spreads from animals to people, mainly via unpasteurized dairy products. Travelers should take special care to avoid infection.
Chiari malformation is an uncommon condition in which brain tissue extends into the spinal canal, causing headaches and other potentially serious symptoms.
Chronic sinusitis involves long-term inflammation or infection of the sinus cavities. Medications can help, and in rare cases surgery can treat this painful condition.
Concussions can be serious injuries that need sufficient time to heal.
You normally lose about 10 cups (2.4 liters) of water every day — much more during exercise or illness. Learn how to stay hydrated.
Encephalitis is inflammation of the brain usually caused by a viral infection. Severe cases can cause brain damage, even death.
Don't be in a hurry to treat a low-grade fever — it's probably helping your body fight infection. High or lasting fevers may need medical attention.
Fatigue and widespread pain are common with fibromyalgia, a condition affecting mainly women. Treatment often focuses on managing symptoms with medication and self-care.
Hantavirus pulmonary syndrome is initiated by a rodent-carried virus that infects the lung tissues, bringing on flu-like symptoms, respiratory problems and even death.
Children of all ages experience headaches, but the causes aren't all the same. Here's how to help your child.
Iron deficiency anemia may leave you feeling sapped of energy. This condition is especially common in women. Iron supplements usually help.
Legionnaires' disease, a severe form of pneumonia, is caused by bacteria that can live in water in air conditioning systems, showers and spas.
Most people exposed to listeria don't become ill. But for those at risk of a listeria infection — a foodborne illness — the consequences can be severe.
A migraine isn't an ordinary headache. In addition to severe head pain, it can cause nausea, vomiting, and extreme sensitivity to light and sound.
Nasal polyps, inflammation-related growths in the nasal passages or sinuses, can block the flow of air and fluid in your nose.
One of the most feared diseases of the 20th century, polio has been eradicated from the developed world but remains a threat in less developed nations.
Polycythemia vera is a rare blood disorder in which a person's bone marrow makes too many blood cells.
Polymorphous light eruption is a sun-induced skin rash affecting people who develop a sensitivity to sunlight.
Pseudotumor cerebri — Comprehensive overview covers symptoms, causes, treatment of increased pressure inside the skull.
Rabies is a serious infection that usually spreads through the bite of an animal infected with the virus.
Salmonella infection will cause only diarrhea and stomach pain in some people, but for infants and immunocompromised people, this bacterial illness can cause life-threatening complications.
Scarlet fever is a bacterial infection that causes a rash, fever and sore throat and usually affects children and adolescents.
Serotonin syndrome — caused by mixing some antidepressants and other medications — can be life-threatening if left untreated.
Central sleep apnea is an uncommon condition that occurs when your brain has problems controlling your breathing during sleep.
Obstructive sleep apnea is the most common type of sleep apnea — a condition that causes you to repeatedly stop breathing while you sleep.
A tension headache is the most common form of headache. A number of treatments are available to help you deal with the pain.
TMJ disorders are painful conditions centered where your jawbone attaches to your skull. The pain may be temporary or chronic.
While mild traumatic brain injury generally results in few long-term problems, more severe injury can cause several physical, emotional, behavioral, communication and cognitive problems.
June 04, 2013
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- NINDS meningitis and encephalitis information page. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/encephalitis_meningitis/encephalitis_meningitis.htm. Accessed April 17, 2013.
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- Headache hygiene tips. American Headache Society Committee for Headache Education. http://www.achenet.org/resources/trigger_avoidance_information/. Accessed April 17, 2013.
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