Mild night sweats?

I’m a 23 year old man, go to the gym, don’t have the best diet consisting of coffee and fast food, but I am a healthy fit individual overall. For the past 2 years I’ve been using the dry sauna 4 days a week for 30 min. As of 1.5 months ago, I began experiencing mild night sweats that would occur every other day. I wouldn’t get drenched but it’s noticeable on my face, neck, and chest. I sleep well other than that. Even when I take a 4 hour nap during the day, I’d experience mild sweats. So I don’t think it’s at strictly at night. Other than that, I’ve been consistently vaping marijuana pens for the past 2.5 years , no lumps, and I feel energized and fine overall.

What could it be and is this normal?

Mild night sweats?
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