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can you upload a clear photo of this spot on your leg?
do you see the "add file" link?
that looks like a skin fungal infection
you need to use a antifungal cream like clotrimazole 1% or tinactin or Tolnaftate 3-4 times a day
for 4-6 weeks until the skin fungal infection is better
use the antifungal cream for 1 week after the rash disappears.
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antifungal creams can take 4-6 weeks of use to clear up
you have to use the antifungal cream 3-4 times a day as well on the skin
the red ring is most likely due to the patches.