Answer:
generalized anxiety disorder
Explanation:
Generalized Anxiety Disorder (GAD) is a disorder characterized by excessive concern (as Leo is presenting) according to the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV).
Generalized anxiety disorder is a common disease. As with many mental health conditions, it is not clear what causes this disorder.
However, it is believed that generalized anxiety disorder is directly related to some neurotransmitters that occur naturally in our brain, such as serotonin, dopamine and norepinephrine. Another belief is that a set of factors may be involved in the reasons why an individual may have the disease, including genetics and external factors, such as the daily stress and the person's quality of life.
In addition to stress, this disorder can cause muscle tension, pain, insomnia, among others.