Anxiety can cause a variety of symptoms and thinking patterns, such as: • Nervousness, restlessness, or tenseness - These feelings are common among people with anxiety. You may have a hard time relaxing and feel constantly on edge or overwhelmed. • Increased heart rate - Anxiety triggers a state of heightened arousal that prepares your body to face perceived threats, part of the "fight or flight" response. • Difficulty concentrating - Due to intrusive thoughts, effects on sleeping patterns, or constant worries, anxiety can make it very difficult to concentrate and be present in the moment. • Stomach pain - Symptoms such as nausea and digestive distress can be brought on by stress or anxiety. • Panic attacks - Intense episodes of fear and discomfort are known as panic attacks. These episodes are characterized by a feeling of impending doom, shortness of breath, sweating, and trembling.