It is not clear what causes panic disorder. In many people who have the biological vulnerability to panic attacks, they may develop in association with major life changes (such as getting married, having a child, starting a first job, etc.) and major lifestyle stressors. There is also some evidence that suggests that the tendency to develop panic disorder may run in families. People who suffer from panic disorder are also more likely than others to suffer from depression, attempt suicide, or to abuse alcohol or drugs.
A healthy diet is also important to reduce and prevent anxiety. It seems counterintuitive that you can "eat your way to calm" but sustaining a healthy diet can really help you to feel more at ease on a regular basis, despite stressors. Some foods that are particularly helpful for reducing anxiety include foods with omega 3 fatty acids (i.e., salmon, walnuts, and flaxseed) and probiotics. Avoid greasy, sugary, high-fat, and processed foods. Additionally, avoiding caffeine when feeling anxious as well as unhealthy substances (i.e., alcohol) could be beneficial. Drinking alcohol might seem like a good way to calm down, but it can lead to sustained anxious symptoms. Incorporating a healthy diet into your lifestyle is fundamental to preventing and reducing anxiety.
Social anxiety disorder (previously called social phobia): People with social anxiety disorder have a general intense fear of, or anxiety toward, social or performance situations. They worry that actions or behaviors associated with their anxiety will be negatively evaluated by others, leading them to feel embarrassed. This worry often causes people with social anxiety to avoid social situations. Social anxiety disorder can manifest in a range of situations, such as within the workplace or the school environment.