I had little blisters with Evan. It took 7, yes 7! different midwifes before one agreed with me that it wasn't because I had sensitive skin. I kept being told that "yep, red hair, pale skin, happens everytime!" I could sit my hands in bleach all day with out a problem, I don't have sensitive skin. What I do have though is a long body and Evan simply was sitting to low which was causing him to pull on my nipple during the feed. You could tell as the blisters ran in a perfect line across my nipple. The trick for me was to have 2 pillows under evan to help keep him at the right hight.

A good rule to remember is Chest to chest and chin to breast.
Your baby should by lying on his side with is chest towards your chest with his arm either tucked down along his body or wraped around your waist. His chin should be touching your breast. If his nose is too scruched up against your breast, try tucking his legs in closer to your body and his nose should naturally move away a bit. Lips should be flicked out a little, imagine the "special K' K this is a good picture of what I mean by having his lips flicked (or flared) out. And most importantly IT SHOULD NOT HURT! if it does, gently break the seal by placing a clean finger in the corner of his mouth, take him off and try again. Avoid a really hungry baby as he will rush to attach and get fustrated while he is still learning. Always try to feed your baby before he gets to distressed. Don't restrict his feeds, allow him to feed when ever and for how ever long his likes, none of this feeding by the clock. Especially in the very first few days as this will help with your milk coming in and also help ease any engorgement.

Hope this has helped some