Could Intermittent Night Sweats With A Musty, Plastic-like Odor Be A Cause For Concern?

Hello! My husband started having night sweats a few years back. It’s not all the time, but it may happen every night for two weeks and then not at all for a week or two. He is almost 40 and generally healthy although he has borderline high blood pressure (medication not needed). His sweat smells like a mix between must and plastic, which is really unusually because he doesn’t usually smell when he works out. Is this something to worry about?