A phobia is an anxiety disorder characterized by an irrational and intense fear of a specific object, situation, or activity. Phobias often develop from early unpleasant experiences and can cause withdrawal, high anxiety, and inability to function when exposed to the feared stimulus. Common phobias include agoraphobia (fear of places from which escape may be difficult), social phobia (fear of appearing foolish in front of others), and specific phobias (fear of objects like insects or situations like flying). Therapeutic nursing management of phobias focuses on systematic desensitization through gradual exposure to reduce fear and improve functioning in the presence of the phobic stimulus.