These painful headaches cause severe pain on one side of the head and tend to occur in bouts called cluster periods.
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 medicine, dialysis and kidney transplant.
Disease
Hyperparathyroidism
Learn about symptoms, tests and treatment for this condition caused by overactivity of the parathyroid glands.
Disease
Hodgkin lymphoma (Hodgkin disease)
Learn how this cancer differs from other lymphomas. Find out about risk factors and treatments, such as chemotherapy, radiation and bone marrow transplant.
Disease
Hot flashes
Learn about this most common symptom of stopping periods and ways to get relief, including hormone therapy and natural treatments.
Disease
Colon polyps
These growths typically don't cause symptoms, so it's important to have regular screenings. Have you had your colonoscopy?
Disease
Testicular cancer
Learn about cancer that starts in the testicles. Treatments include surgery, chemotherapy and radiation therapy.
Disease
Prostate cancer
Learn about detection, diagnostic approaches, treatment options and advances for prostate cancer, including robotic prostatectomy and current research.
Disease
Achilles tendon rupture
An Achilles tendon rupture is an injury that is usually painful and likely to affect your ability to walk. Surgical repair is sometimes necessary.