The answer to 'extermination damage' is that it can be caused by a variety of pest control methods, including the use of chemicals, heat treatments, or physical removal of pests. Symptoms may include discoloration, staining, or physical damage to surfaces, furniture, or other household items. Solutions depend on the type and extent of the damage, but may involve professional cleaning, repair, or replacement of affected areas.
It's important to note that while some minor extermination damage can be addressed through DIY methods, more significant or widespread issues often require the expertise of a professional pest control technician. They have the knowledge, equipment, and safety protocols to properly address the problem and minimize collateral damage.