Stiffness and numbness in the extremities when you are angry is likely to be hyperventilation syndrome. Hyperventilation syndrome, as the name implies, is caused by hyperventilation. When a person is angry, it triggers physiological reactions, such as increased adrenaline secretion, sweating and rapid heartbeat. Some people will feel tightness in the chest and even feel unable to breathe, so they will take deep, large, rapid breaths to satisfy their need for chest tightness treatment. After deep and big breathing, there will be excessive carbon dioxide excretion, which is a condition of respiratory alkalosis, and it will cause the patient to have numbness and stiffness in the limbs, and sometimes even the hands will be flexed abnormally like claws. It is a disease between physical and psychological disorders. It tends to occur in girls, especially in women with strong personalities. Once this happens, the easiest and most direct way is to have the patient put a plastic bag over the nose and mouth, or a paper bag, to breathe back the exhaled carbon dioxide, and the symptoms will soon be relieved.