High pressure is normal and low pressure is high, and eat too salty, genetic factors, bad habits, the use of drugs and related diseases have a relationship. 1. Eat too salty: the so-called high pressure normal low pressure high, refers to the systolic blood pressure <120mmHg, diastolic blood pressure ≥ 90mmHg. generally with the daily diet eat too salty, intake of excessive sodium chloride, resulting in the body of sodium retention, elevated blood volume has a relationship with, will lead to blood on the blood vessel pressure increases. 2. Genetic factors: high pressure normal low pressure high this phenomenon, with family aggregation characteristics, that is to say, a family with blood relatives, there will be more than one onset of the disease. 3. Unhealthy habits: studies have shown that smoking and drinking, often stay up late, irregular work and rest, will cause the human sympathetic nervous system dysfunction, resulting in vasoconstriction and diastolic dysfunction, the emergence of low-pressure high. 4. The use of drugs: many drugs may trigger high pressure normal low pressure high, such as long-term use of hormone drugs, licorice tablets, contraceptives and so on. 5. Suffering from related diseases: Kidney disease, heart disease, hyperthyroidism and menopausal syndrome may also lead to high BPNL. If you find that your blood pressure is high, you should consult a doctor and follow the doctor's instructions for examination and treatment.