Anxiety disorders are among the most common mental disorders worldwide that have an impact on the quality of life of individuals and society. These disorders manifest as excessive feelings and worries, unwanted physiological reactions, and behavioral changes, and can appear in some generalized anxiety disorders, social anxiety disorders, panic disorder, and obsessive-compulsive disorder. Comprehensive diagnosis of the causes of this disease is of great importance. Research has shown that biological, genetic, and neurobiological factors, psychological factors such as cognitive styles and stressful experiences, and environmental factors such as social pressures and traumatic events, play a key role in their development and exacerbation. The use of accurate indicators distinguishes anxiety disorders from other mental and physical disorders and makes the treatment process targeted. The treatment of anxiety disorders is based on two main pillars: drug treatment and psychotherapy. Selective serotonin reuptake inhibitors (SSRIs) and benzodiazepines, along with cognitive-behavioral techniques (CBT), acceptance and commitment therapy (ACT), and behavioral therapies, are treatment options to reduce and improve individual functioning. Studies show that a combination of medication and psychotherapy produces better results than either alone. Also, challenges such as treatment, resources, and stigma require practical and innovative solutions. Finally, future research is preliminary to understanding the biological and psychological mechanisms of mental disorders, developing new treatment methods, and using advanced technologies. Also, specialized treatment training, public education, and upgrading the health system infrastructure to provide comprehensive services and treatment are needed to address the growing burden of eating disorders in the world.