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?

An infrared camera can help detect moisture behind walls without causing damage, highlighting cooler areas indicative of moisture presence.

Rising damp occurs when moisture from the ground rises through the walls by capillary action. This is especially common in older buildings without a proper damp-proof membrane. Look for a tide mark on the lower part of the wall, salt deposits, or a musty smell, which are telltale signs of rising damp.

Measuring the moisture content at different heights of