Yes, I know it sounds painful and it is. I have a 12 month old and have been battlling this problem for about the past 3 months. I don't know if the arrival of new teeth changed the dynamic of his suck or if it has just gotten more powerful as he has gotten bigger and if that is what is causing this or if it could be something else. I've been able to get them healed using Soothies but as soon as I stop I get cracks again. My baby is only nursing at nap time and nighttime now and he's not up for weaning.
I was starting to have the same problem with my older son when he was around the same age (9-10 months of age) but he willingly gave up nursing at about a year and it never got as bad as it is now.
Anyone have any experience with this?