Tracking down the cause of your itch can take time and involve a physical exam and a careful history. If your doctor suspects your itchy skin is the result of an underlying medical condition, he or she may perform tests, including:
Jan. 28, 2014
- Blood test. A complete blood count can provide evidence of an internal condition causing your itch, such as iron deficiency.
- Chemistry profile. This test is used to determine if you have a liver or kidney disorder.
- Thyroid function test. Thyroid abnormalities, such as hyperthyroidism, may cause itching.
- Chest X-rays. Signs of underlying disease that are associated with itchy skin, such as enlarged lymph nodes, can be seen by using radiography.
- Fazio SB, et al. Pruritis: Overview of management. http://www.uptodate.com/home. Accessed Aug. 28, 2013.
- Cassano N, et al. Chronic pruritus in the absence of specific skin disease. American Journal of Clinical Dermatology. 2010;11:399.
- Goldsmith LA, et al., eds. Fitzpatrick's Dermatology in General Medicine. 8th ed. New York, N.Y.: The McGraw-Hill Companies; 2012. http://www.accessmedicine.com/resourceTOC.aspx?resourceID=740. Accessed Aug. 28, 2013.
- Yosipovitch G, et al. Chronic pruritis. The New England Journal of Medicine. 2013;368:1625.
- Benzocaine topical products: Sprays, gels and liquids — Risk of methemoglobinemia. U.S. Food and Drug Administration. http://www.fda.gov/Safety/MedWatch/SafetyInformation/SafetyAlertsforHumanMedicalProducts/ucm250264.htm. Accessed Aug. 28, 2013.