Anger, twitching and chicken-clawed hands are caused by the following conditions: the first condition is due to neurological pathologies, such as epilepsy or Parkinson’s. When angry, the sympathetic nerves of the brain are more excited, and the frequency of cortical discharge increases significantly, which can trigger or aggravate epilepsy and Parkinson’s under such conditions, resulting in the phenomenon of anger, twitching and chicken-clawed hands. The second condition may be due to hypertension, because when the blood pressure rises, it produces a certain expansion and stimulation of the cerebral blood vessels, in addition to the sympathetic and parasympathetic nerves of the cerebral blood vessels, producing a certain excitatory and stimulating effect, which will cause a temporary dysfunction of the cerebral cortex, unable to control the contraction and diastole of the body’s muscles, which will result in twitching when angry and a chicken-claw hand.