Answer:

Blood pressure is the force of blood against artery walls as the heart pumps, delivering oxygen and nutrients throughout the body. A reading of 85/55 mmHg is below the 90/60 mmHg threshold, which is generally considered low blood pressure.

When salt (sodium chloride - NaCl) is consumed, the sodium enters the bloodstream. Sodium retains water, increasing blood volume. Like adding water to a pipe increases internal pressure, sodium can temporarily raise blood pressure. However, this effect is short-lived. Regularly consuming a high-salt diet leads to excess sodium, which strains the heart and kidneys, increasing the risk of high blood pressure, heart failure, stroke, and chronic kidney disease.

The World Health Organization (WHO) recommends that adults consume no more than 5 g of salt per day, equivalent to one teaspoon. You should not increase your salt intake to raise your blood pressure without consulting a doctor to determine the underlying cause of your low blood pressure.

A sustainable and scientific approach to improving blood pressure is maintaining a balanced diet and healthy lifestyle. Those with low blood pressure should drink about 2 liters of water daily, especially after exercise or sweating. Eating regular, smaller meals throughout the day can prevent blood pressure drops after eating. A varied diet rich in vegetables, fruits, whole grains, lean meats, fish, and eggs provides essential nutrients. Limit alcohol consumption, as it can lower blood pressure. Regular light exercise and sufficient sleep also support healthy circulation.

Many cases of low blood pressure are physiological and not cause for concern. However, if your blood pressure is consistently low and accompanied by dizziness, lightheadedness, fatigue, difficulty concentrating, or fainting, consult a cardiologist. Low blood pressure can be related to anemia, heart conditions, endocrine disorders, or medication side effects.

People with low blood pressure should drink water and electrolyte solutions to temporarily increase blood volume. Certain postures, such as elevating your legs while lying down, crossing your legs while sitting, or standing up slowly, can increase blood flow to the brain and reduce the risk of fainting. However, these measures offer only temporary relief and do not address the underlying cause.

MSc. Dr. Duong Thi Thao

Department of Cardiology, Tam Anh General Hospital, Hanoi