Pest infestation occurs when unwanted insects or animals invade a space, often causing damage or health risks. Common pests include ants, cockroaches, termites, and rodents. These pests can multiply quickly, making it essential to address the problem promptly to prevent further issues. Infestations can happen in homes, gardens, or commercial buildings, and they may result from poor sanitation, structural damage, or easy access to food sources. Effective pest control methods include exclusion, sanitation, and the use of pesticides or traps to eliminate the pests and prevent their return.