So I've been checking my body head to toe everyday for stretch marks. So far not one on my stomach, legs, back. But I noticed that the purple "veins" on my inner boob/nipples. Are not dark veins. If I gently rub my finger over the skin I can feel stretch mark tears... I don't understand how I have stretch marks on my inner boob around my Nipple. Shouldn't they be on the outer parts of my breasts?