Idiopathic environmental intolerance (IEI) is a set of symptoms caused by contact with some kinds of substances. Read on to learn more about causes, symptoms, triggers, and treatment.

Asthma is a chronic, inflammatory lung disease with recurrent breathing problems.

The most effective ways to treat allergies are avoidance, allergy immunotherapy, and medicine.

Detailed information on allergy, including symptoms, diagnosis, and treatment

Avascular necrosis develops when blood supply to a bone is cut off. This causes the bone to die and can cause pain and joint problems.

A blood transfusion is a procedure in which you receive blood or parts of blood through an I.V. (intravenous) line.

Thrombocythemia is a disease in which your bone marrow makes too many platelets. This can cause too much clotting or not enough clotting. Read on to learn more.

Detailed information on thalassemias, including alpha thalassemia, beta thalassemia (Cooley's anemia)

Detailed information about hematology and blood disorders, including blood donations, blood banking, blood transfusion, bone marrow transplantation, aplastic anemia, anemia of folate deficiency, glucose-6-phosphate dehydrogenase deficiency, hemolytic anem

Sickle cell disease (SCD) is an inherited blood disorder that causes the body to make abnormal hemoglobin. This is the protein in red blood cells that carries oxygen to all parts of your body. Read on to learn more.