A high pressure of 103 mmHg and a low pressure of 66 mmHg are within the normal blood pressure range, but routine blood pressure retesting should be monitored. Normal blood pressure should be <140mmHg systolic and <90mmHg diastolic, high pressure of 103mmHg and low pressure of 66mmHg are within the normal range, which are normal blood pressure values. However, blood pressure fluctuates physiologically, so regular blood pressure checkups are needed to keep an eye on the blood pressure situation. It is recommended that patients should have their blood pressure checked regularly, and if there is any abnormality, they should have their blood pressure checked again and consult a doctor in time.