Heya, I have this indent or dimple worry since january, everyday mostly.. when I tense my right arm muscle while keeping my arm down, there appears a dent or dimple at the side of my breast. Without tensing them, there's nothing! I can't feel any lumps inside my breast at the place where it indents when I tense the muscles. If it was breast cancer, would I have more symptoms by now? Nothing has changed since I first saw it.. I tried thinking it's a muscle thing but google keeps saying there aren't any muscles in the breast and a indent or dimple is breast cancer. Hate the worry..