Re: 11 weeks still having latch issues
Definitely not too late to fix this problem. If you're able to nurse, and not suffering from cracks/blisters at this point, I think you're probably looking at the sort of issue that will eventually fix itself as the baby's mouth grows.
Large nipples can sometimes cause problems because they can make it difficult for the baby to take a big enough "bite" of breast. A big bite of breast helps the nipple land in the ideal spot on the back of the tongue, under the soft palate. When the nipple is too shallow in the mouth, sitting on the front of the tongue underneath the hard palate, it can get compressed and hurt as the baby sucks. Compression will cause the ridge/crease you're seeing, and also the vasospasms. There's a lot more motion on the front of the tongue than on the back- try sucking on your finger and you'll see why this is true. Put the finger on the front of your tongue, and it will experience a lot of motion and compression, but put it on the back of your tongue, almost down to your throat, and the fingertip will experience only gentle motion.
Again, time will probably fix this problem. But why wait? It sounds like you've mostly talked to the LC...? If so, hands-on help might be really helpful. You might want to discuss something called the "sandwich technique". With the sandwich technique, you compress the breast as you latch the baby on, forming a flatter profile that crams more breast into the baby's tiny mouth. It's like taking a big bite of a tall sandwich- the more you flatten the sandwich, the more you can fit into your mouth.
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