Are people possibly spitting into your surgical wounds? Are you gushing bodily fluids like blood and bile so much that others are wearing masks to keep it from getting in their mouth?
In addition, there's no scientific evidence behind even wearing them in the surgical suite
https://academic.oup.com/cid/article/65/9/1589/3858163
"The use of masks, impermeable surgical drapes, hospital-laundered surgical scrubs, and modern surgical gowns—all staples of infection control in the operating room—were not guided by clinical studies [14]. As with many practices in medicine, behaviors passed down from one generation to the next become common practice and are subsequently mandated by governing bodies [15, 16]. In fact, the argument for many of these practices is as much about protecting healthcare workers from their patients as it is protecting patients from healthcare workers’ germs."