I have a slight indentation just under my left areola, running to almost the bottom of the breast. I'm fairly sure it's always been there - my left breast is a little larger and less round than the right, I figured it was just a harmless imperfection. I happened to notice it more recently as I was getting changed under strong overhead lighting... Now reading about 'dimpling' I'm getting really worried! I self-examine my breasts regularly, and I can't feel any kind of lump, or see any other warning symptoms in the surrounding breast tissue. I can only really see it when I raise my arm, but it doesn't change/worsen when I tense my pectoral muscle, nor when I pull the skin of the breast upward. I am 29, no children, pretty active and healthy, and have no personal or family history of breast (or any other) cancer. I am going to make an appointment for a proper exam ASAP, but if anyone could offer any other explanations to calm my nerves I would be grateful. Thanks.