While some worry and tension is normal, an anxiety disorder includes extreme feelings of tension, irritability, worry, frustration, turmoil, and hopelessness. Insomnia, restless sleep, grinding of teeth, jaw pain, an inability to sit still and difficulty coping are common. Anxiety may give rise to panic attacks, which can be so severe that they can be mistaken for a heart attack. Several medical interventions are available. Massage, biofeedback and other relaxation techniques may be helpful. Natural anxiety support options include GABA, St. John's Wort and L-Theanine.