I have weird moles - they look really irregular in shape and are partially very dark. My family has a pretty bad history with cancer, and every few months I have this huge skin cancer scare because of these moles. My dermatologist is always grinning when I'm in his waiting room again. He says they're just speckled and not irregular, that they have lighter and darker pigments throughout, but they really look weird, so he always checks them anyway. After about 8 years of this I'm finally feeling like I'm absolutely stupid. He always tells me that the chance of them becoming cancerous is very low, and the worst thing is, I'm a doctor myself - but I just think they really look like the start of skin cancer! Maybe that's just my way of dealing with all the cancer I've been confronted with all my life. It's stupid and irrational, but I really can't change it. If I don't go to see the dermatologist right after I get the skin-cancer-scare again, I can't sleep for days.