An anxiety attack may manifest with one or more of the following symptoms: (i) breathing difficulty; (ii) palpitations; (iii) a feeling of unreality; (iv) pains or tightness in the chest; (v) trembling, dizziness or feeling unsteady; (vi) sweating; (vii) a feeling of faintness; (viii) a fear of dying; (ix) a feeling of losing control; (x) tingling in hands and feet (parasthesiae); (xi) choking or smothering feelings.