Need help! Dark armpits and inner thighs

Aljis

I am very uncomfortable about my dark underarms and inner thighs. I cannot even wear sleeveless or shorts as I feel very uncomfortable. Can someone help me with home remedies or recommendations to help me get rid of my issues. I was diagnosed with pcod/ pcos 5 years back and that’s when it started to turn black. Any tips would be appreciated. And thank you in advance for those who took time to respond to me.