Fear and phobia are related but distinct concepts. Fear is a natural response to perceived threats and causes physical symptoms like increased heart rate and sweating. Phobias, however, involve extreme and irrational fears that significantly interfere with one's life by causing panic attacks. While many people experience fears, phobias are anxiety disorders that restrict activities and need to be addressed. The document provides examples of common phobias and their impacts to distinguish between ordinary fear and more serious phobic conditions.