Immune System

The immune system is the body’s natural defense system that helps fight infections. The immune system attacks organisms and substances that invade body systems and cause disease.

Acquired Von Willebrand’s Disease

Acquired von Willebrand disease is a rare bleeding disorder that might be caused by other medical problems or medicines. It prevents blood from clotting properly. It is rarer than the inherited form of von Willebrand disease. Medical problems that might cause acquired von Willebrand disease include: Lymph disorders…

Addison’s Disease

What is Addison’s disease? Addison’s disease develops when the adrenal glands, which are above the kidneys, are not able to make enough of the hormones cortisol and, sometimes, aldosterone. Your body needs both of these hormones to work as it should. Cortisol helps the body cope with extreme physical stress from…

Allergic Reaction

Covers commons allergies, including food, medicine, insect stings, and animals. Covers seasonal allergies like hay fever. Offers home treatment and prevention tips. Includes interactive tool to help you decide when to call a doctor.

Allergic Reaction to Tattoo Dye

Allergy to dye Allergic reactions to tattoo dye are rare. The various colors in a tattoo are made from different materials. For example, the red color comes from mercury, the green from chromium, the yellow from cadmium, and the blue from cobalt. Allergic reactions to red dyes occur more often than allergic reactions to…