Dermatophagoides pteronyssinus is a common species of dust mite found in homes, particularly in bedding, carpets, and upholstered furniture. These tiny, microscopic creatures thrive in warm, humid environments and feed primarily on dead skin cells shed by humans and pets. Although they are harmless to most people, their waste products can trigger allergic reactions and asthma in sensitive individuals. Reducing humidity and regularly cleaning living spaces can help minimize their presence and the potential for allergic responses.