Information for Patients
Also called: Hypersensitivity
An allergy is a reaction by your immune system to something that does not bother most other people. People who have allergies often are sensitive to more than one thing. Substances that often cause reactions are
- Dust mites
- Mold spores
- Pet dander
- Insect stings
Normally, your immune system fights germs. It is your body's defense system. In most allergic reactions, however, it is responding to a false alarm. Genes and the environment probably both play a role.
Allergies can cause a variety of symptoms such as a runny nose, sneezing, itching, rashes, swelling, or asthma. Allergies can range from minor to severe. Anaphylaxis is a severe reaction that can be life-threatening. Doctors use skin and blood tests to diagnose allergies. Treatments include medicines, allergy shots, and avoiding the substances that cause the reactions.
NIH: National Institute of Allergy and Infectious Diseases
- Allergic reactions (Medical Encyclopedia)
- Allergic rhinitis - self-care (Medical Encyclopedia)
- Allergies (Medical Encyclopedia)
- Allergies, asthma, and dust (Medical Encyclopedia)
- Allergies, asthma, and molds (Medical Encyclopedia)
- Allergy testing - skin (Medical Encyclopedia)
- Angioedema (Medical Encyclopedia)
- Antihistamines for allergies (Medical Encyclopedia)
Also called: Clotting disorders
Normally, if you get hurt, your body forms a blood clot to stop the bleeding. For blood to clot, your body needs cells called platelets and proteins known as clotting factors. If you have a bleeding disorder, you either do not have enough platelets or clotting factors or they don't work the way they should.
Bleeding disorders can be the result of other diseases, such as severe liver disease or a lack of vitamin K. They can also be inherited. Hemophilia is an inherited bleeding disorder. Bleeding disorders can also be a side effect of medicines such as blood thinners.
Various blood tests can check for a bleeding disorder. You will also have a physical exam and history. Treatments depend on the cause. They may include medicines and transfusions of blood, platelets, or clotting factor.
- Bleeding disorders (Medical Encyclopedia)
- Bleeding time (Medical Encyclopedia)
- Disseminated intravascular coagulation (DIC) (Medical Encyclopedia)
- Partial thromboplastin time (PTT) (Medical Encyclopedia)
- Prothrombin time (PT) (Medical Encyclopedia)