Rib flaring?

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This is my third pregnancy and everytime I get this constant pain below my left breast in my ribs. It's a stabbing pain that almost feels numb and mostly happens when I'm sitting or laying. I'm 24 weeks and it just started with this pregnancy but so much worse than my others. My left rib almost feels bruised now. In the past I have talked to my midwives and there has been no concern, just something I have to deal with. Has anyone had this before? What did you do for the pain?