These painful headaches cause severe pain on one side of the head and tend to occur in bouts called cluster periods.
Disease
Dry macular degeneration
Blurred or reduced central vision could be a sign of macular degeneration. Find out about symptoms and treatment for this common eye disorder.
Disease
H1N1 flu (swine flu)
Find out more about flu caused by the H1N1 virus. Learn how to prevent and treat the flu.
Disease
Follicular lymphoma
Find out more about the symptoms, diagnosis and treatment of this type of non-Hodgkin lymphoma.
Disease
Dilated cardiomyopathy
In this heart muscle disease, the heart's main pumping chamber stretches and can't pump blood well. Learn about the causes and treatment.
Disease
Swollen knee
This condition can be caused by trauma, overuse injuries, or an underlying disease or condition. A fluid sample from the knee may be needed for diagnosis.
Disease
Mold allergy
Coughing, sneezing and itchy eyes often happen with this common allergy. Find out how to treat and help manage this condition.
Disease
Merkel cell carcinoma
Learn about this skin cancer that grows quickly. Find out about symptoms, diagnosis and treatments, including Mohs surgery, radiation and immunotherapy.
Disease
Esthesioneuroblastoma
This cancer begins in the upper part of the inside of the nose. Treatment usually involves surgery. Other options include radiation therapy and chemotherapy.
Disease
Chronic myelogenous leukemia
Learn about chronic myelogenous leukemia symptoms and causes. Find out how CML is treated, including targeted therapy and bone marrow transplant.
Disease
Chronic kidney disease
Learn about kidney failure symptoms, tests, diagnosis and treatment options, including medication, dialysis and kidney transplant.
Disease
Hyperparathyroidism
Learn about symptoms, tests and treatment for this condition caused by overactivity of the parathyroid glands.