Far infrared rays generally do not raise blood pressure. At present, the phenomenon of elevated blood pressure has the difference between primary hypertension and secondary hypertension, in which the cause of primary hypertension is still unclear. Epidemiological studies show that genetics, high salt diet, obesity and insulin resistance are involved in the development of primary hypertension. A clear cause of secondary hypertension can be found, such as pheochromocytoma or primary aldosteronism, and this secondary hypertension is likely to return to normal as the cause is removed. In addition, there are certain triggers for elevated blood pressure, such as emotional excitement, staying up late or drinking strong coffee. However, there is no evidence that far infrared rays increase blood pressure. Therefore, in case of elevated blood pressure, it is necessary to go to the hospital in time for examination, and combined with the examination, be treated by the doctor’s system of reasonable antihypertensive drug regimen.