I had the same problem back when my son was about 9 months old. I cut back my pre-natal/lactating vitamin dosage to one per day (despite the two vitamin daily dosage). I found that this helped to curb my acne. Also, be sure to avoid foods rich in iodine. A couple of weeks ago, I made some miso soup with kelp and I had a flare-up the next day. I also take an acidophilus and lactobacillus supplement every day which seems to have improved my overall health (including skin health). Good luck!