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Nosebleed Learning Center
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Allergies are abnormal reactions of the immune system that occur in response to otherwise harmless substances.
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An allergy is an exaggerated immune response or reaction to substances that are generally not harmful. See also: Allergic conjunctivitis; Allergic reactions; Allergy testing; Allergy to mold, dander, dust; Atopic dermatitis (eczema; Contact dermat...
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Physical allergies are allergic reactions to cold, sunlight, heat, or minor injury.
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Allergies are abnormal reactions of the immune system that occur in response to otherwise harmless substances.
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Allergies are abnormal reactions of the immune system that occur in response to otherwise harmless substances.
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Allergies are abnormal reactions of the immune system that occur in response to otherwise harmless substances.
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Food allergies affect approximately 3 percent of children and 1 percent of adults in the United States. It is estimated that an even larger percentage of the population experiences problems with food intolerance. Worldwide, adverse reactions to fo...
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A hypersensitive response by the immune system to a foreign substance that is ordinarily harmless. Allergies account for more office visits to pediatricians than any other ailment, besides the common cold, and are responsible for more missed schoo...
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A specific allergy is not usually inherited, but your tendency to develop allergies is often passed down through families. If both parents have allergies, their child is likely to have allergies. However, your chance of developing allergies seems ...
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Sinusitis refers to an inflammation of the sinuses, airspaces within the bones of the face. Sinusitis is most often due to an infection within these spaces.
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Sinusitis refers to inflammation of the sinuses that occurs with a viral, bacterial, or fungal infection. See also: Chronic sinusitis
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Sinusitis is an inflammation of the sinuses, which are airspaces within the bones of the face. Sinusitis is most often due to an infection within these spaces.
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Sinusitis, or sinus infection, refers to an inflammation of the sinuses, the air spaces within the bones of the face, due to an infection within these spaces.
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A set of related cancers that form in the bone marrow and other blood-producing organs. Leukemia is named after the leukocytes, white blood cells which mutate before maturity and become cancerous. These cells reproduce rapidly, suppressing product...
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Leukemia is a cancer that starts in the organs that make blood, namely the bone marrow and the lymph system. Depending on specific characteristics, leukemia can be divided into two broad types: acute and chronic. Acute leukemias are the rapidly pr...
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Leukemia is a group of bone marrow diseases involving an uncontrolled increase in white blood cells (leukocytes. For information about a specific type of leukemia, see the following: Acute lymphocytic leukemia (ALL; Acute myelogenous leukemia (AML...
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Hemophilia refers to a group of bleeding disorders in which it takes a long time for the blood to clot. Related topics: Hemophilia A; Hemophilia B; von Willebrand disease.
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Hemophilia is a genetic disorder—usually inherited—of the mechanism of blood clotting. Depending on the degree of the disorder present in an individual, excess bleeding may occur only after specific, predictable events (such as surgery, dental pro...
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Hemophilia is a coagulation disorder arising from a genetic defect of the X chromosome; the defect can either be inherited or result from spontaneous gene mutation. In each type of hemophilia (hemophilias A, B, and C), a critical coagulation prote...
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