In this condition, the muscles in the esophagus don't relax, preventing food and drink from moving into the stomach. Learn more about this rare digestive disorder.
Disease
Botulism
Bacteria that have contaminated food or a wound may cause this rare but serious condition. Learn about how to prevent it.
Disease
Pineal gland tumor
Learn about tumors that affect the pineal gland, including types, symptoms, diagnosis, treatment options, recovery and long-term outlook.
Disease
Frozen shoulder
This painful condition usually begins gradually and makes the shoulder hard to move. Exercises can help restore range of motion.
Disease
Ehrlichiosis and anaplasmosis
Learn how to prevent and treat these two tick-borne illnesses.
Disease
Lyme disease
Learn about the symptoms, diagnosis and treatment of this common tick-borne illness.
Disease
Arteriovenous malformation
In this condition, a tangle of blood vessels affects the flow of blood and oxygen. Treatment can help.
Disease
Myasthenia gravis
A breakdown in the communication between nerves and muscles causes weakness and fatigue of muscles under your control.
Disease
Food poisoning (foodborne illness)
Learn more about illnesses that can cause upset stomach, vomiting and diarrhea within hours of eating tainted food.
Disease
Meningioma
This is the most common type of tumor that forms in the head and may affect the brain. Find out about symptoms, diagnosis and treatment.
Disease
Knee pain
Learn about this common complaint, which can result from an injury or medical condition, and find out which treatments may help.
Disease
Occupational asthma
Dust, fumes and other substances at work can cause asthma. Find out how to recognize this common type of asthma.