High Blood Pressure vs. Low Blood Pressure: How Are They Different? Which One Is More Dangerous?

High blood pressure (Hypertension) is a condition where the systolic blood pressure (top number) is 140 mmHg or higher and/or the diastolic blood pressure (bottom number) is 90 mmHg or higher while at rest on a consistent basis. It can be elevated in just one of these values or both. Hypertension often shows no clear symptoms in its early stages and is usually detected only when severe complications arise. It can be caused by various factors, including genetics, aging, obesity, lack of exercise, consuming high-sodium foods, smoking, and regular alcohol consumption.

Hypertension often does not present obvious symptoms in the early stages, but it is typically detected when blood pressure rises to dangerous levels. Common symptoms include:

• Dizziness, headache (especially at the back of the head)
• Palpitations, rapid breathing, or chest tightness
• Blurred vision or unprecedented visual disturbances
• Nosebleeds in some cases
• If blood pressure is extremely high, there is a risk of heart attack or stroke

• Avoid heavily seasoned foods, reduce sodium intake, and avoid processed or pickled foods.
• Maintain a healthy weight and exercise regularly.
• Refrain from smoking and drinking alcohol.
• Avoid drinking tea, coffee, or other caffeinated beverages.
• Drink plenty of clean water, aiming for at least 1.5 to 2 liters daily.
• Avoid stress and ensure adequate rest.
• Take prescribed medications as directed by a physician and monitor blood pressure regularly.

Low blood pressure (Hypotension) is a condition where the systolic blood pressure (top number) is lower than 90 mmHg and/or the diastolic blood pressure (bottom number) is lower than 60 mmHg. It can be low in just one of these values or both, preventing sufficient blood flow to various organs. It can be caused by several factors, including lack of rest, dehydration, fasting, stress, heart disease, or as a side effect of certain medications, such as antihypertensive drugs or diuretics.

If you experience frequent episodes of lightheadedness, severe headache, blurred vision, rapid heart rate, shortness of breath, or near-fainting, you should seek medical attention promptly to evaluate the cause. These symptoms can be warning signs of dangerous hypotension, which, if left untreated, could lead to shock or insufficient blood supply to vital organs.

• Drink adequate water, at least 6-8 glasses daily, to support healthy blood circulation.
• Avoid rapid changes in posture to prevent sudden lightheadedness or dizziness.
• Eat a balanced diet containing all 5 food groups in appropriate portions. Avoid overeating in a single meal to prevent postprandial hypotension (blood pressure drop after eating).
• Engage in regular, light exercise such as brisk walking, swimming, or yoga to stimulate blood circulation.
• Refrain from smoking and drinking alcohol.

• Measuring your blood pressure at home every day is an effective way to continuously track your cardiovascular health, especially for those at risk or already diagnosed with high or low blood pressure. Here are the recommendations for monitoring your blood pressure at home:
• Measure your blood pressure twice a day: in the morning (within 1-2 hours after waking up) and before going to bed. Take 2-3 consecutive readings, leaving a 1-2 minute interval between each, and calculate the average to ensure accuracy.
  • Rest for at least 5-10 minutes before taking a reading. Avoid drinking coffee, smoking, or exercising beforehand, as these can cause inaccurate results.
  • Sit in the correct posture during measurement. Sit on a chair with back support, keep both feet flat on the floor, and rest your arm on a table so that it is at heart level. Wrap the cuff around your upper arm, about 1-2 centimeters above the elbow crease.
  • Do not talk or move during the measurement to prevent inaccurate readings.
  • Record your readings in detail every time, including the systolic (top) number, diastolic (bottom) number, and heart rate. Do this consistently for at least 3-7 days to help your doctor track your progress.
  • It is recommended to use an automatic blood pressure monitor that is medically certified, as they are user-friendly and deliver precise, reliable results.

• Both high and low blood pressure are indicators of cardiovascular circulatory abnormalities that can affect your health in different ways, both in the short and long term. This is particularly true for high blood pressure, which often shows no initial symptoms but is a major risk factor for heart disease, stroke, and kidney disease. On the other hand, although low blood pressure may not seem as dangerous, experiencing severe symptoms such as frequent lightheadedness, fainting, or loss of consciousness is equally something that should not be ignored.

If you have abnormal blood pressure readings or experience symptoms such as dizziness, palpitations, and fatigue, you should undergo a medical evaluation to identify the root cause and plan appropriate health care. Taking care of yourself early is the key to achieving even better health.

If you are interested in a risk assessment or a personalized, drug-free cardiovascular health restoration plan, with every step supervised by our highly experienced medical team at LINNA Clinic, please feel free to contact us at @linnaclinic, Whatsapp +66919799554, or call 063-609-8888.