Jock itch (tinea cruris) is an infection that typically begins in the groin area and tends to spread towards the thighs, often exhibiting a half-moon shape. Common symptoms of this condition include:

* Reddish to purplish lesions with distinct borders
* Intense itching
* Scaly skin
* Fluid-filled blisters (vesicles) or yellowish crusts
* Changes in skin color
* A burning sensation and peeling skin
* Pain or tenderness