Metformin can help PCOS women with high blood sugar, but it's not about skin... Spironolactone is usually prescribed as a help for acne/skin/hair growth.

I am a nurse and also was put on this medication. I have never heard of Metformin used for skin.

I had two flare ups last year of HS, previous to that was 10years earlier, all three times I had to have emergency surgery, my dr prescribed me metformin 2x500mg daily and I don’t wanna jinx myself but I’ve had no issues 1 year down the line after taking the metformin x

My doctor suggested I look into Metformin as well. She said its a diabetes medicine given to help PCOS patients bodies better regulate/use blood sugar, that could result in weight loss and ovulation (I def. imagine it does more thought - at least from what I've seen from different sites).
If you don't mind me asking - are you having any side effects? This is one of the three meds my doc suggested for me.

Try cutting out dairy in your diet. I have not had dairy in the past week and my skin has cleared up majorly