Is your toilet loose?
About 50% (that's Half!) or more of the homes I inspect have a toilet which is loose where it is secured to the floor. Then about 50% of those found loose have elevated moisture detected in the flooring near the toilet. Yes, that means the toilet is likely leaking at the wax ring. Gross!
These leaks are a conducive condition to wood destroying organisms such as rot and wood infesting bugs. The sub-flooring and structural components below could get damaged and result in costly repairs. Checking your toilet is easy, just stand over the toilet lid, squeeze your legs around the base of the toilet and apply pressure left and right to the toilet (I call this the toilet dance). If any movement, contact your local plumber for further evaluation and repair, typically removal of the toilet to inspect the subfloor, replacement of the wax ring and re-securing the toilet to the floor.