Pityriasis rosea: Herald patch of pityriasis rosea does not respond to anti-fungal cream. It may respond to steroid cream. The appearance of pityriasis and fungal tinea corporis can be similar. Pityriasis rapidly progresses. Tinea corporis can be slow. Pityriasi stypically resolves in 8-12 weeks. If its 8 weeks and rash has not improved, re-examination is needed.
Answered 2/23/2021
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If it was truly dxed accurately as PR, the herald patch should respond to a steroid cream of mid potency or greater potency. Since the PR is not a fungal infection, an antifungal cream would not be effective. The patch responded because the cream contained a steroid, which was the basis for its success.
Answered 3/3/2021
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