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?

from the ground through a process known as capillary action, where water is drawn up through the foundation into the walls. Identifying the source of moisture is essential for addressing the issue effectively.

If the bubbles are accompanied by other signs such as discoloration, mold growth, or a musty odor, this strongly suggests a leak inside your wall. Other indicators include peeling paint, crumbling drywall, or a consistent wetness in the same area, even when it has not rained.