kellie2

I myself have not gotten any but my mother-in-law has quite a few that she didn't have when she was younger. Could be her genes, could be from the sun when she was younger. She's in her 70's and it's more common in older people but I'm sure younger ones like you can get them, too. Do you go in the sun alot without sunscreen? Because this is usually the most common reason for what you're experiencing, and the fact that some people are just more susceptible to them. The one on your arm you definitely need to have looked at. And yes, you can get skin cancer in more than one spot but treatment would still be the same - removal and biopsy, and if it comes back malignant, they simply remove a bit more tissue until it comes back clear. For melanoma, that's a dangerous one because it gets into your system and spreads, which is why you never let a suspicious mole go once it's noticed - people die from this one so always get it checked.
As for skin cancer being heriditary - I pesonally don't think so because skin cancer is caused from the sun, you don't inherit it. If you spend time in the sun without protection, that's dangerous and could be the underlying reason for what's causing the moles to appear. And you don't need to be laying out in it tanning; they say that most skin cancers are caused by incidental exposure, meaning just coming and going without sunscreen on. Which is also why most skin cancer is on the left side of the face - that's the side driver's have exposed.