Are there any workers in professions where wearing a mask is mandatory?

I have to wear a hat and a mask when working part-time.

I didn't notice it in the winter, but now that the weather is getting warmer and I've started sweating, acne has started appearing along the line where my hat touches my forehead.

It seems like there are noticeably more breakouts on the parts of my face covered by the mask compared to when it was cold.

I think it's due to humidity and sweat, but it doesn't seem to be getting better even if I wash my hat frequently.

Is there perhaps a realistic solution?