Have you noticed a muscle tension? It is the last symptom to cover. The muscle tension is constant in people with Anxiety Disorder. This term refers to the trembling limbs, twisted nerves, squeezing jaw, or inflamed back. Human organism fights not only with sicknesses like flu or cold by making the body feel uncomfortable. The same happens when the organism tries to resist stressful situations so that the patients may experience near-constant muscle tension and fatigue.