Thank you for the additional details.
If your daughter can take the picture, obviously that would help a lot- otherwise to some degree I am guessing...
But, from your description it still does sound most like ringworm- If you have not even tried an over the counter antifungal cream- that would be my first thought- I do not know what is available OTC in S Africa- but any pharmacy should be able to supply topical antifungal creams like clotrimazole or terbinafine - and use as directed for 10-14 days.
Less likely thoughts, that can look like your description include a rash from Lyme disease, lupus, or even leprosy.
Without examining you I would say to try the antifungal- If that does not clear it up, the next step truly would be to see a doctor in person- possibly for a biopsy if the clinical diagnosis remains unclear.
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