A lot of sore nipple blisters/blebs with 11mth old?

[carriecook'n'sew]

The past few weeks I keep getting a lot of pain when nursing on one side and noticed I did have a whitish nipple blister. I looked it up and said hot water, try to remove skin and nurse a lot. That sort of worked, it killed to scrape at skin but it kind of broke (and bled a little) but it seems to keep almost coming back.

When I'm not wearing a bra I can feel the tip of my nipple is really tender, it mildly hurts when I nurse and now when I look I see several whitish spots but they look more inside, not right under the skin if that makes sense.

He's not nursing a lot anymore, he still is really into it at around 4am and then 7am, then nursing 1-2 times during day but really quick and he fidgets and stands up , rolls around etc, then bed time is hit and miss too. Is it just that, or any ideas on how to prevent?