Is this used for jock strap itch?

yes

Three commonly used, over-the-counter anti-fungals are miconazole (Micatin), clotrimazole (Lotrimin) and tolnaftate (Tinactin).

Of course they could, but regular underwear is made to be absorbent in the crotch where perspiration often builds up. Jock straps are not so absorbent, and do not cover enough 'territory'.

Bupleurum contains compounds known as saikosaponins, which have anti-allergic and anti-inflammatory effects.

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