I frequently get breakouts around my chin when I wear a mask for a long time. How can I identify the cause?

Since I spend most of the day wearing a mask these days, small breakouts are frequently appearing along my jawline and around my mouth. Even though I wash my face thoroughly, the problem keeps recurring, so I'm confused whether it's an issue with excess sebum or if it's due to friction or sweat. At first, I thought it was just simple acne and even tried squeezing them, but that only left marks, which is making me more self-conscious. I'm curious to know what areas anyone who has had a similar experience checked first. I'd like to know if changing my cleansing routine is the priority, or if it would be faster to visit a doctor to have my skin examined and identify the cause. If you could share your lifestyle habits or skincare routines, I will use them as a reference to organize my thoughts. Thank you.