Hi A.! First, I want to say that it's wonderful that you're breastfeeding your baby. Nothing can be better than being close to your baby and giving your baby the best nutrition. I don't think, though, that bruising easily is a symptom of breastfeeding. Certain medications and supplements can thin your blood and cause you to bruise easily. Are you taking aspirin, NSAIDS (Motrin, Aleve, etc), fish oil, or Vit. E? Some foods can cause that too...I forget what they are but you could probably find out. It wouldn't hurt and would probably be best for you to see your dr. and get a blood test done ASAP. Take care, B.