OUCH....I Hope There Is an Answer Out There

Changing positions helps so teeth don't hit the same spot. And rub breastmilk on the cuts as it helps healing.

His latch is "lazy". Try different positions and see if that helps. For instance, if you usually lay down to nurse him, hold him in your lap sitting up or use the football hold. With a proper latch, the teeth do not come into contact with your breast. If you try that and it doesn't work, call a Le Leche League leader in your area or a lactation consultant.

He has a bad latch.
It should not hurt if they are latched on correctly, even if they have teeth.
Readjust his mouth, or your body or use a "Boppy Pillow" for nursing
to add added support for nursing.

A nipple shield can help remind your baby of a proper latch and give your nipple time to heal. Babies R Us has them on the shelves.

If he is latched correctly I do not think his teeth would be touching your breast. I never had any issues with nursing during teething NOR after teeth were there.

Please, do not wean. It is not time to stop breastfeeding (as some have implied..), but you do need to work on the latch, if you are feeling his teeth, then there is a latch problem. You've gotten some good advice about correcting it, I also second the nipple shield, as a temporary aid, if that and the other tips you've gotten don't help, then check out a lactation consultant, it doesn't cost much and is SO worth it! You're doing a GREAT job Momma! Hang in there!

Lazy latch! I had the same when my DD got her first teeth. Just make sure he latches on properly (like a newborn) and it will stop. With a proper latch his tongue will cover the bottom teeth.
If it doesn't want to heal you could use nipple shields for a while to let those cuts close up.
Good luck!

Might be that time to end.... You see dogs and cats nip their kits and pups when they start hurting them while nursing too.
Only other thing I can suggest is try different positions to see if that works.
I nursed my youngest until he was two, never had that happen, so I know there is a latch that can work, how you make that happen is a mystery tho and will just take experimentation.

I'm glad you came on here and asked instead of just stopping nursing. I personally would put a bandaid or gauze over that spot and just keep nursing. Try to fix the latch, obviously, but the gauze will also protect you.

I get them - it's like the skin is split open or cracked. I've gone to the dr about it too. It's even happened when I wasn't nursing after my son just caught me the wrong way when I was holding him. My skin is super sensitive and they said it was likely dermatitis or eczema so I now only wash with sensitive detergent all of my under garments. They also gave me a prescription ointment called alcortin A. Its a combo anti-fungal, anti-bacterial, anti-inflammatory with aloe. Relief comes right away! I couldn't believe how long I waited in pain and how much the stuff helped immediately! It's why I responded to your post! The first time dr gave me enough samples to clear it up and more recently I got a prescription. It was expensive even with insurance but so worth it.
Regarding all the lazy latch comments - this could be contributing which is why I suffered so long and worked on the latch. It was beyond that for me. The laundry soap really played a role here as it happened to me outside of nursing.

When do you find his bottom teeth are digging in? When a baby is actively nursing, his tongue is out and doing the work of nursing - and bottom teeth generally aren't touching you. So, if he's not really nursing, like at the end of the feeding, then his teeth could be touching. If you think he's teething and that's making him rub his teeth on you some, you could rub an ice cube or cold washcloth on his gums before nursing.

Since you mention it's mostly on one side, I also wonder if a positioning change would help. For example, maybe his tongue is doing the work, but because of a tilt his teeth are touching on one side. Try different positions - I even nursed my son with him sort of sitting in my lap and snuggled against me. This link (under the section of scraping teeth) has some ideas: http://kellymom.com/ages/older-infant/biting/ (Also, the site is great if you want tips for treating the sore nipples.)

You don't need to wean for this like some are suggesting...teeth don't mean nursing has to end (check out Time magazine right now, haha). From your description, it doesn't even sound like he's intentionally biting, and I think you can fix this with some positioning changes. Good luck!

Do you have a breast pump? When I had thrush, I used to feed him only on the side that wasn't affected, then I pumped the other side. I did this at every feeding until it healed. Of course, I never made it to 11 months and I know your boobs do not respond the same way, but is it worth a try? Can you just feed him on the one side for a day or two?

You could try nipple shields! They sell them in most baby sections for the pharmacy or stores like Target or WalMart. They are over with the feeding/nursing supplies. They are a thin silicone that would put a bit of a barrier between you and your little guy's teeth. I used them with my son.

You may plan to nurse for much longer but if it was me I would start weaning soon. I had one do that to me and it got so painful I dreaded nursing and it was around that same age. I weaned the last two at 12 months partly due to the teeth. I hope someone can give you better advice though.