These small, painful sores form inside the mouth. They have a white or yellow center with a red border. The pain may make it hard to eat or talk.
Disease
Coma
Learn what can cause this state of prolonged loss of consciousness. While a coma rarely lasts longer than a few weeks, some people never wake from one.
Disease
Acute kidney injury
Learn what happens when the kidneys suddenly stop working, what causes this condition and how it's treated.
Disease
Autoimmune hepatitis
This type of hepatitis happens when the immune system attacks the liver with destructive antibodies. Immune-suppressing medicine is the main treatment.
Disease
Primary progressive aphasia
Find out more about this type of dementia that affects the speech and language areas of the brain.
Disease
Viral hemorrhagic fevers
Learn about the symptoms, treatment and prevention of these sometimes deadly diseases.
Disease
Gastrointestinal bleeding
Bleeding from anywhere in your digestive tract is a symptom of a disorder. Bleeding can be hidden or obvious, slight or severe.
Disease
Muscle strains
Minor strains may only overstretch a muscle or tendon, while more-serious injuries may involve partial or complete tears in these tissues.
Disease
Prostate cancer recurrence
Rising PSA after prostate cancer treatment may signal recurrence. Learn how it's diagnosed, what it means, treatment options and outlook.
Disease
Toxic hepatitis
Find out about symptoms and treatment of this liver disease. It's caused by exposure to certain substances, such as alcohol or medicines.
Disease
Popliteal artery entrapment syndrome
Calf pain cramping your style during a workout? Know the symptoms of popliteal artery entrapment syndrome.
Disease
Gangrene
A severe bacterial infection or lack of blood flow can cause body tissue to die. Know the warning signs and symptoms of this life-threatening condition.