Flange size and output

So I’ve been using the standard 24mm shield that comes with the momcozy s12 pro. I’m 4 weeks PP and can get a decent amount and then some. However around week 3, pumping was very painful so I measured my nipples and it appeared that 24mm was correct for me (large nipple gang lol). But I decided to try 21mm inserts just to see. They feel so much better and in just one day my nipples began healing because they wasn’t being tugged so much and pumping wasn’t painful. However my output has decreased. So I was thinking, is it because the flange is not taking enough of my nipple? Is it just a coincidence that my supply has decreased temporarily at the same time I decided to switch the flange. Shall I take the inserts out and see if it makes a difference again. I’m super confused because pain free pumping is great but now my milk supply is affected and I don’t want it to signal to my body to take less if I’m not being emptied fully.

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Using the wrong flange overtime can injure your nipple and pumping should not hurt. Make sure there are not other factors that could have caused the decrease in supply such as drinking or eating less. I noticed my supply will drop if I don't eat or drink enough.

@Kimberly thank you!! So basically the flange that hurts is the wrong one? Regardless of my supply output? x

Yes. I was using the wrong ones and my nipples hurt all the time. After switching, just like you, they stopped hurting. If your supply dropped only a little give it a day or two to see if it comes back up. Also try pumping a few minutes after the milk stops as that will signal your body that your baby needs more milk. Try increasing the suction just a little as well. When using the larger size I used a weaker pump strength since it hurt, but after using the right size I increased it. A stronger pump level doesn't mean more milk, but play around with it to see if that could help.

I found I had to use bigger at the start then smaller half way as when my boobs become less firm it pulled too much skin in

@Kimberly ooooh very good point about the suction. I shall increase this as it’s super low due to the pain of the previous flange. Thank you ☺️

@Sophie half way through pumping? Wow that’s dedication 😭😭