This natural skin bleacher is very popular amongst Instant anal bleaching countries. Tomato boasts the highest concentration of vitamin A and C of all fruits yes…. No matter Instant anal bleaching — avoid dangerous chemicals like hydroquinone — which can cause skin irritation, burning or rashes. So, if you want a very simple way on how to bleach your anus at home naturally, then the answer to your question might just be this one. Tomato is another great natural remedy that has been known to whiten darkened skin without unwanted side effects.