itchy could be 2 things : zinc deficiency or dehydration
Coconut will kill the yeast - it is effective topically so will tea tree oil so will a garlic solution (boiled garlic)
In my experience it is more a matter of zinc deficiency or dehydration
-A skin cream will rehydrate (apply 2X/day I love the Glaxal Base brand)
-Zinc (or selenium they have similar properties) will prevent damage while your body is helping the toxins out. A zinc cream (avoid the expensive dermatologist stuff buying a diaper rash cream at your local drugstore ) or/ and selenium + zinc oral supplements