What do you do if your mom constantly steals from you?

Everytime my mom comes over she uses my bathroom and I CONSTANTLY have stuff missing. I chalked it up to me misplacing it and just let it go. I just went to her house to do some laundry while she's out of town(no washer and dryer in my unit) and I found several things just sitting on her bathroom sink. Tweezers, eyelash curler, and other makeup items. Everything that's been missing. What would you do about this? It's petty small items & she's addicted to pills so she would pull the "idk what you're talking about" ... or "I don't remember" shit.