Just to clarify; you don't get skin cancer from regular sun exposure. You get skin cancer from either severe sun damage or direct skin over exposure to toxic chemicals - especially mass-produced sunscreens (read more here;
https://draxe.com/75-of-sunscreens-are-toxic-what-to-do-instead/). This is a key distinction that the so-called experts either don't yet know or won't admit.
The most effective non-surgical/non-toxic method of treating skin cancers is applying black salve. It has worked incredibly for thousands of people around the world and also for several of my family. Despite the warnings of dermatologists, who pressured health authorities to get it banned because it was the greatest threat to their industry, it really does work better than their best treatments options - and without the expensive cost and damaging side-effects!