Achluophobia is the intense fear of darkness, affecting both children and adults. Unlike simple unease in low light, it can trigger anxiety and avoidance behaviors. Rooted in natural human instincts, this fear arises because darkness reduces visibility, increasing feelings of vulnerability. Achluophobia can manifest in everyday situations such as walking down dark hallways, entering basements, or camping at night. Recognizing and understanding achluophobia helps normalize the fear and encourages strategies to manage it effectively.