The range of grade 1 hypertension refers to values of systolic blood pressure in the range of 140-159 mmHg and diastolic blood pressure in the range of 90-99 mmHg, and in principle, less than 160/100 mmHg is considered grade 1 hypertension. For simple systolic blood pressure greater than or equal to 140 mmHg, called simple systolic hypertension, this type of hypertension blood pressure reaches the level of confirmed hypertension, but no heart, brain, kidney complications. However, blood pressure can fluctuate significantly with the physiological rhythm of the body, or changes in the external environment, and the blood pressure of each person is not fixed in a day, so blood pressure measured at different times of the day, not less than three times, each time the systolic blood pressure is 140-159 mmHg, diastolic blood pressure in 90-99 mmHg, can be diagnosed as Grade 1 hypertension, can also be called mild hypertension, generally It is only elevated in a state of stress and exertion. The blood pressure will continue to rise only with the prolongation of the disease, which can also be called slowly progressive hypertension.