Detailed information on egg allergy, a type of food allergy. Learn about egg-free recipes, reading food labels for an egg-free diet, and tips for safely eating out.

Detailed information on allergy testing, including blood tests and skin tests.

Detailed information on allergy triggers and symptom control

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 IV (intravenous) line.

Thrombocythemia is a disease in which your bone marrow makes too many platelets. Platelets are blood cell fragments that help with blood clotting. Having too many platelets makes it hard for your blood to clot normally. This can cause too much clotting or not enough clotting.