Found these strange bubbles forming under the paint on my wall near the floor. They feel soft to the touch and seem to be getting bigger—is this a reaction to humidity or something worse?

and cause it to condense.

Perform a simple moisture test by taping a piece of aluminum foil to the wall where the bubbles are present. Leave it for 24 hours, then check for condensation. If moisture is present on the wall side of the foil, it indicates a problem within the wall.

Additionally, inspect nearby plumbing fixtures for leaks and check your roof and gutters for signs of water ingress. Using a moisture meter to check the wall’s