I bf my ds who is 9mths. Every so often I get a little blister on my nipple, it bloody hurts when feeding! It usually goes within a couple of days so it's not a major problem, but was just wondering what causes this and what I should be doing to prevent it happening. I am guessing lazy latch is to blame, but sometimes it seems to happen when ds wants feeding more often than usual. Can any clever people help me? TIA