Whether a blood pressure of 142/90 mmHg at age 48 is serious or not cannot usually be generalized; either a transient high blood pressure measurement or the diagnostic criteria for grade 1 hypertension have been met, it is usually not serious. However, if not taken seriously, it can lead to serious consequences. Mild hypertension is generally diagnosed when three blood pressure measurements are taken on non-simultaneous days with systolic blood pressure at 140-159 mmHg and/or diastolic blood pressure at 90-99 mmHg. It should be taken seriously and blood pressure should be monitored regularly. Patients with mild hypertension generally do not cause serious damage to target organs such as the heart and brain, and can undergo therapeutic lifestyle interventions, such as quitting smoking and limiting alcohol consumption, reducing body weight, and decreasing sodium and fat intake, in order to try to keep their blood pressure within the normal range. If the blood pressure does not fall within the normal range after lifestyle intervention, drugs such as nifedipine should be used to lower blood pressure under the guidance of a doctor. 48-year-old blood pressure 142/90mmHg is generally not serious, but if you do not pay attention to it and do not actively control the blood pressure, it may lead to the patient to become moderately severe hypertension, and even the emergence of heart attack, cerebral infarction and other serious complications. It is also necessary to consult a doctor in time and follow the doctor’s instructions for treatment.