Anxiety can cause the sensation of shaking or trembling, according to the American Psychiatric Association. This is especially true in the case of panic disorder, which is characterized by overwhelming physical and emotional distress.
Feeling nervous and powerless; rapid breathing and heartbeat; sweating; trembling; and feeling weak or tired are symptoms of anxiety, explains Mayo Clinic. A sense of impending doom or panic and ruminating on the current worry are additional symptoms associated with generalized anxiety.
Treatment of anxiety disorders involves medication and psychotherapy, notes the American Psychiatric Association. Many doctors use both approaches. Medication can help quell physical symptoms, while therapy works on the underlying issues that caused the anxiety. Short-term use of benzodiazepines and long-term use of antidepressants can help calm the anxiety so the psychotherapy is effective. Still, it may take six to 12 weeks for improvement of the condition.
Risk factors for anxiety include being female, experiencing trauma, living with a great deal of stress, having other family members with an anxiety disorder and using avoidant coping techniques such as escalating drug or alcohol use, according to Mayo Clinic. Complications of anxiety involve depression, sleep problems, headaches, substance abuse, gastrointestinal upset, suicide and poor quality of life.