A phobia is an intense and overwhelming fear of something that is out of proportion to the actual threat. This fear can be triggered by specific objects, situations, or activities, like heights, spiders, or flying. People with phobias often go out of their way to avoid the thing they fear, even if it disrupts their daily life. Phobias can cause strong physical reactions, like a racing heart or sweating, and emotional distress. While the fear might feel uncontrollable, therapy and other treatments can help people manage or overcome phobias.