For patients with occasional hypertension: 1. Common causes of occasional hypertension are sympathetic over-excitement, such as excessive tension, mental over-excitement, anxiety, over-fatigue, excessive stress, heavy smoking, alcoholism, and overeating, etc. 2. Occasional hypertension also occurs in some endocrine-metabolic disorders, such as in patients with hyperthyroidism. Patients with a history of coronary artery disease, such as unstable angina pectoris and arrhythmia, may also experience occasional hypertension.4 Patients with a history of cerebrovascular disease, such as acute cerebrovascular insufficiency, may also experience occasional high blood pressure.