Excellent song about this: https://www.youtube.com/watch?v=qNi1sevKNd0

I used to get something similar under my beard/mustache. I’ll use a tiny bit of this shampoo periodically and it controls it quite well (assuming it’s fungal). Head and Shoulders might work too. https://a.co/d/2nMo1nH

If you are in a noisy environment, you can use earplugs with your bone conduction headphones. That’s what I do on the treadmill and while mowing the grass.