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?

moisture content can also provide valuable insights.

First, reduce humidity levels in the room by using a dehumidifier or increasing ventilation. If you suspect a leak, turn off the water supply to the affected area and contact a plumber. For rising damp, consider installing a damp-proof course to prevent further moisture ingress.

Temporarily remove the bubbling paint to allow the wall to dry out. This will prevent further damage and mold growth until permanent repairs can be made.