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Jock itch (tinea cruris) is a pretty common fungal infection of the groin and upper thighs.
Jock itch is caused by fungi called dermatophytes. These microscopic organisms are normal inhabitants of your skin, and stay in check as long as your skin is clean and dry. People taking broad-spectrum antibiotics, with weakened immune systems, or who have diabetes are more at risk to develop the rash.
Jock itch is also sometimes called crack fungus, crotch itch, bag rot or crotch rot. It is a common fungal infection that affects the skin of your inner thighs, buttocks and genitals.Itch
The rash may affect only your groin, but it may spread to include your inner thighs, genitals, and areas around your anus, rectum, or Lesions caused by jock itch can extend from the crease between the inner thigh and pelvis, over the adjacent upper inner thigh, and into the anal area.
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