has part has part has modifier Anxiety Episodic paroxysmal anxiety HP:0000740 An anxiety attack may manifest with one or more of the following symptoms: (i) difficulty breathing; (ii) palpitations; (iii) a feeling of unreality; (iv) pain 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 (paresthesia); (xi) choking or smothering feelings. UMLS:C1854339 Recurrent attacks of severe anxiety, which occur without restriction to any particular situation or set of circumstances, are therefore unpredictable. Pheochromocytoma quality abnormal