PCOS pain, Help!

Right now my sister is on her period and she’s in so much pain.

She’s been diagnosed with PCOS since around 4/5 years ago when the drs somehow couldn’t work out why she was in pain and decided to take out her appendix, while doing so they realised there were cysts on her ovaries and the appendix wasn’t the problem but it was a burst cyst.

She gets really bad pain every time she gets her period to the point that she will take a sick day for her period over taking one for actually being sick because her job had her on her feet all day.

I honestly just want to know what can help with the pain? Her drs and gynaecologist won’t prescribe or suggest anything and she’s in agony.