Lets start with the stretch marks. Unfortunately this is something many of our patients struggle with. Stretch marks essentially are tars in the dermis, the deeper layer of the skin. So nothing that you apply topically will make a difference. Using something like olive oils etc, will help prevent more from forming, but the damage in the deeper layers have been done. The PRP and micro needling treatments are definitely a very good treatment option, BUT you have to remember that collagen (the protein that now needs to fix the problem) take 3 to 6 months to be produced, also 1 session will hardly be enough to produce sufficient amounts of collagen. So, my advice would be to continue with treatments (minimum of 4-6 treatments) and wait at least 3-6 months to see results. Due to your dark skin type, beautiful as it is, is does produce lots of melanin (pigment), so every little trauma , be that a breakout, scrape of scab, your body will try and repair itself and the best way it knows how is to produce more melanin. Unfortunately nothing will make you body stop producing melanin, BUT we can put you on pigment inhibiting ingredients to reduce the speed and quality being produced. Skin block is of cause the nr 1 treatment for dark patches and pigmentation as the skin get traumatised by unprotected sun exposure (this in turn creating more melanin). I would recommend Heliocare 360 range. This sunblock does not only protect you from UVA and UVB but also visible light and infra-red light. this can be used daily and is available at all Skin Renewal branches as well as the Skin Renewal online skin shop. When is comes to lightening of the entire body... there is now real way this can be done. The colour of our skin is our genetics and we cannot change that. We can however do Vit C and Glutathoin Iv's to brighten the complexion and give you a lighten/softened skin tone.