There are five main types of severe anxiety, and each has different symptoms. The types are:
Generalized anxiety disorder: This condition involves excessive and unreasonable anxiety and worry lasting at least six months. Signs include restlessness, fatigue, difficulty concentrating, irritability, muscle tension, shaking, crying, pacing, sweating, rapid breathing, rapid heartbeat, fearfulness, and sleep problems.
Panic disorder: People with this condition have recurring attacks of panic. They may have dizziness, faint feelings, sweating, trembling, chills, flushes, nausea, numbness, heart palpitations, or chest pain. These attacks occur suddenly and last several minutes.
Obsessive-compulsive disorder: This disorder causes recurrent and persistent thoughts, impulses or images that are unwanted and inappropriate. The person performs repetitive behaviors in response to these thoughts.
Phobias: These are irrational, intense fears of certain things or situations, which interfere with normal functioning.
Post-traumatic stress disorder: This occurs after a person experiences or witnesses a traumatic event. Symptoms include recurring memories, nightmares, and flashbacks