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Tests and diagnosis

By Mayo Clinic staff

Your doctor can determine if you have jock itch or another skin disorder, such as a dermatitis or psoriasis.

Your doctor may take skin scrapings or samples from the infected area and view them under a microscope. This is called a potassium hydroxide (KOH) test. If a sample shows fungi, treatment may include an antifungal medication. If the test is negative, but your doctor still suspects that you have jock itch, a sample may be sent to a lab to determine whether it will grow fungi under the right conditions. This test is known as a culture. Your doctor may also order a culture if your condition doesn't respond to treatment.

References
  1. Hainer BL. Dermatophyte infections. American Family Physician. 2003;67(1):101-108.
  2. Goldstein A, et al. Dermatophyte (tinea) infections. http://www.uptodate.com/home/index.html. Accessed Aug, 25, 2008.
  3. Nadalo D, et al. What is the best way to treat tinea cruris? The Journal of Family Practice. 2006;55(3):256-258.
  4. Gupta AK, et al. Optimal management of fungal infections of the skin, hair, and nails. American Journal of Clinical Dermatology. 2004;5(4):225-237.
  5. Diflucan (prescribing information). New York, N.Y.: Pfizer; 2008.
  6. Grifulvin V (prescribing information). Raritan, N.J.: Ortho Pharmaceutical Corporation; 1997.
  7. Lawrence Gibson (expert opinion). Mayo Clinic, Rochester, Minn. Sept. 9, 2008.

DS00490

Nov. 15, 2008

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