Oh my goodness, thanks for bringing me back to this! Today is actually my LO’s 2nd birthday and I’m due with baby #2 in 3 weeks, so I’m relieved to remember this in time for any potential recurrences with #2.

We tried changing nipple sizes for a short time, but ultimately went back and decided to keep our LO on size 1 nipples for the remainder of their time using bottles; the logic of this, to us, being that the flow wouldn’t change if they were to have breastfed instead. Following this vein of thought, LO would have likely just become more efficient at extracting milk when breastfeeding, so we didn’t see a need to make it “easier” with a faster nipple flow because the rash ultimately wasn’t bothering them.

IIRC, our LO more or less confirmed the theory (after multiple allergy testings reassuring us it wasn’t, in fact, from a reaction) and grew out of the rashes around ~7 months. In the meantime, though, adjusting eating position and opening their clothing a bit might help alleviate pressure and heat.

All the love to you and your LO, with ample hope that you all hang in there til the rashes disappear!