Boogers are dried mucus that our body produces in the nose to protect us from viruses, bacteria, dust, pollen, and other irritating particles. Mucus, a slimy substance mostly made of water, salt, and immune cells, traps these tiny particles to keep them from reaching the lungs. Tiny hairs called cilia then move the mucus to the front of the nose where it either gets blown out or dries and forms boogers. Boogers serve an important role in keeping the respiratory system clean and preventing infections by trapping harmful substances from the air.
In addition, boogers form more readily when there is excess mucus production, such as during colds, allergies, or in dry environments. Though often seen as unpleasant, boogers are a sign that the nose is functioning well to protect the body.
Thus, we have boogers because they are a natural defense mechanism that traps irritants and pathogens, helping to keep the lungs and airways safe from damage or infection.
