I have a red-haired friend who is very prone to skin cancers. She sees the specialist twice a year and he zaps the things while they're very tiny. I think he uses a laser. She has to use very strong sunscreen and carry an umbrella in the summer, like a Victorian lady with a parasol.
Half a dozen elderly people in our village have basal cell carcinomas on their noses or the skin of the scalp at the top of their heads. They've all had them removed, and successfully cured, but as I've spent long periods under the fierce sun of Africa, I keep an eye on my skin.