Low Blood Pressure Numbers Explained

Blood pressure in simple terms is the amount of force created by blood on the blood vessel walls while circulating. Normal blood pressure is measured at 120/90. The reading can be lower than this also. Some people normally have low pressure all through their lives while for others it fluctuates.

Low blood pressure or hypotension can happen to anybody irrespective of age. If you keep a regular tab on your blood pressure then it is possible to understand if you have a chronic low pressure or not. Normal and healthy people with low pressure do not have the chance of suffering a sudden heart attack or stroke, but if the pressure has dropped then it is good to consult a doctor.

How to know that you have hypotension?

The blood pressure reading shows two numbers:

  • Systolic Blood Pressure
  • Diastolic Blood Pressure

Systolic Blood Pressure – When the heart beats

Systolic Blood Pressure is defined as when the pressure exerted by our blood flowing through our arteries is dynamic and it reflects constantly what the heart is doing. When our heart beat actively it is called “Systole” that means ejection of blood into the arteries, and the dynamic ejection of blood through the arteries causes the pressure to increase. During the active cardiac contraction, peak blood pressure reached and this is called systolic pressure. The normal systolic pressure is between 90 to 120 mm Hg.

Diastolic Blood Pressure – When the heart relaxes

Diastolic blood pressure is when the pressure of blood exerts within the arteries. When the heart contraction finished the cardiac ventricles relax fleetingly so that they can be refilled with blood for the next contraction and this period of ventricular is called diastole. And the blood pressure during this period known as diastolic blood pressure, the normal diastolic blood pressure is in between 60 to 80 mm Hg.

According to doctors if the readings are less than 90mmHG or 60mmHG then you have a low blood pressure. Either of these numbers has to be lower to signify low blood pressure.

Many feel that the systolic or top number is more important than the lower or diastolic one. This is because when the systolic pressure is being measured the heart gets squeezed and the blood is pushed all over the body. The diastolic number refers to the pressure of the blood between the heart beats. The systolic number is believed to provide an idea regarding the possibility of a heart attack.

This theory changes according to circumstance and the age of the patient. For younger people who are less likely to have a heart attack, the diastolic number bears more importance. The systolic number becomes more important for aged people and they need proper treatment.

Blood Pressure Numbers (Normal, Low and High)

Low Blood Pressure Range

Systolic pressure (mm Hg) Diastolic pressure (mm Hg) Blood Pressure Range
90 60 Borderline Low blood Pressure
60 40 Too Low Blood Pressure
50 33 Dangerously Low Blood Pressure

Normal Blood Pressure Range

Systolic pressure (mm Hg) Diastolic pressure (mm Hg) Pressure Range
130 85 High Normal Blood Pressure
120 80 Normal Blood Pressure
110 75 Low Normal Blood Pressure

High Blood Pressure

Systolic pressure (mm Hg) Diastolic pressure (mm Hg) Stages of High Blood Pressure
210 120 Stage 4
180 110 Stage 3
160 100 Stage 2
140 90 Stage 1

Causes and Symptoms of High Blood Pressure

Blood Pressure Range by Age – For Children

Age Males (mmHg) Females (mmHg)
1 – 3 yr 80/34 – 120/75 83/38 – 117/76
4 – 6 yr 88/47 – 128/84 88/50 – 122/83
7 – 10 yr 92/53 – 130/90 93/55 – 129/88

Can low pressure be alarming?

Low blood pressure is not dangerous if there are no symptoms of other weaknesses. If there is a sudden drop or all of a sudden both the top and bottom limit numbers are drops than normal then it can be a cause for concern and need treatment as soon as possible.

When the blood pressure drops the blood flows through the arteries and veins reduces.

If the flow is still lower then it starts affecting the function of the vital organs of the body like heart, brain, and kidney because the blood is incapable of carrying the normal amount of blood required for their proper functioning.

If the insufficient amount of blood flow continues then organs can be damaged temporarily or even permanently.

Signs of low blood pressure

Some of the common features of hypotension are as follows:

  • Dizziness
  • Chest Pain
  • Nausea
  • Blurred vision
  • Light-headedness
  • Severe thirst


  • Low blood pressure numbers should not worry you if health is on your side. For the aged and ailing it is a cause of concern which should be addressed immediately.
  • Get your blood pressure checked from time to time to understand your health even if something is not wrong with your health visibly.
  • Understanding the importance of the systolic and diastolic readings is a must simply.
  • To understand if you should contact your healthcare provider.
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About Yamini Singh 104 Articles
Confident, Quirky and Bold. Yamini is a fashion and lifestyle blogger who loves to utilize her style to experiment on new things and push limits. She always had a flair for writing, loves to read blogs and apart from fashion, she gives genuine dating and relationship tips.

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