The answer to 'wasp odor' is that a strong, unpleasant odor coming from a wasp nest is a common sign of an active infestation. Wasps release pheromones and other chemicals that can create a distinct, musky smell, especially as the nest grows larger. This odor is a warning sign that wasps are present and may become aggressive if the nest is disturbed.
The best solution is to locate and safely remove the wasp nest, either through DIY methods or by calling a professional pest control company. DIY options like spraying the nest with insecticide may work for small, accessible nests, but larger or hard-to-reach nests are better handled by experienced technicians who can properly identify the species and apply the right treatment.