A good blood pressure is generally one that is not in the high or low range. Blood pressure above 140/90 mmHg is considered high, while a reading below 90/60 mmHg is considered low.
Readings between 120/80 mmHg and 129/84 mmHg may be classified as pre-hypertension. This means there may be a greater chance of developing high blood pressure, so regular monitoring is important. High blood pressure often causes no symptoms, although some people may experience dizziness, headache, blurred vision, shortness of breath, or confusion.
The best way to know whether blood pressure is high or low is to measure it with an electronic monitor at home or at a pharmacy. Symptoms alone are not reliable because dizziness, weakness, tiredness, and confusion can occur with either high or low blood pressure.
If the reading is above 160/100 mmHg after resting for one hour, especially with symptoms, medical care is recommended. Frequent abnormal readings should be assessed by a general practitioner or cardiologist. Only take blood pressure medication that has been prescribed by a doctor.