why do flies follow me

Flies follow you mainly because the human body provides them with warmth, moisture, and nutrients. They are attracted to the sweat, salt, oils, and dead skin cells on your skin, which serve as food sources for them, much like feces or rotting flesh. Flies also detect humans through odors such as carbon dioxide that we exhale and other chemicals released from our skin, which differ among individuals based on genetics, diet, and activities. Additionally, flies are naturally curious and have sensory adaptations enabling them to quickly detect food or moisture and evade danger, making them persistent around people. This curiosity, combined with the nutrients and suitable habitat humans provide, leads to flies frequently landing on or following us. They are not trying to annoy but are simply seeking nourishment and an environment favorable to their survival. Preventative measures like keeping skin clean, avoiding sweat accumulation, and minimizing exposure to food residues can help deter flies from following you.