What's the recommended usage for topical clindamycin and topical tretinoin?

Thanks for the detailed summary. There’s no problem at all with seeing a GP to treat your acne – the treatment algorithm for acne is pretty standard. My pet peeve is only with clinics who overcharge based on having some sort of special super secret ingredient “miracle acne creams”, because the reality is that all effective topical creams contain well-known ingredients, and packaging it under their own brand shouldn’t give them the right to charge more, or “lock-in” patients to only using their creams.

The problem you have just described is not uncommon and I have seen many patients with truncal acne which can sometimes be rather stubborn or persistent. It is true that sometimes, acne-like lesions on the trunk can be due to a fungal infection. The appearance can be very similar to acne. At times, you can even have both present at the same time. A fungal scraping can help in confirming the diagnosis. It is difficult to tell from the description if your condition is predominantly due to acne or a fungal infection.