Breast Reduction - nipple dry/flaky with pink underneath, is this normal?

I am 10 days post op from a bi lateral breast reduction surgery. The right breast had 360grams removed but the left had 700grams so its healing has been harder. I am concerned about the skin on my left breast nipple. The nipple area is pretty dark on the edges and while there is still dried blood the skin has been dry and flaky. If i scratch it the skin underneath is sometimes pink? The nipple still has feeling and gets hard however. Is this normal, the dry flaky skin, or should I be concerned?