Unlike high blood pressure, which often shows no signs, low blood pressure has many symptoms. There is usually no cause for alarm if low blood pressure is not showing any symptoms.
Blood pressure is measured by systolic pressure over diastolic pressure. A healthy blood pressure is less than 120/80 mm Hg,
according to the American Heart Association. Blood pressure readings as low as 85/55 are not a problem as long as there are no low blood pressure symptoms.
Dr. Crandall: Normal Blood Pressure Linked to Key Discovery
According to the Mayo Clinic, these 10 symptoms may signal dangerous low blood pressure and require medical attention:
• Blurred vision
• Dizziness or lightheadedness
• Fainting
• Lack of concentration
• Fatigue
• Nausea
• Cold or clammy, pale skin
• Rapid or shallow breathing
• Depression
• Thirst from dehydration
Severely low blood pressure may indicate heart or neurological disorders.
Alert: Blood Pressure Information Your Doctor Hasn't Told You
Sometimes, blood pressure can decline rapidly, but experts say there isn't much cause for concern if no symptoms occur. However, a sudden decrease that results in dizziness or fainting and may indicate underlying problems, the American Heart Association notes. Such disorders as severe infections, allergic reactions, or uncontrolled bleeding may cause sudden declines in blood pressure.
Some symptoms are minor and easily addressed, the Mayo Clinic reports. For example, spending too much time in the sun may cause low blood pressure and dehydration.
However, it’s important to check with a doctor. A physician may not recommend treatment when there are no symptoms, but will suggest routine checks to look for dangerous low blood pressure.
Some easily treated conditions of low blood pressure include lack of nutrients in the diet and pregnancy, which may lower blood pressure temporarily. More serious indications include heart problems, blood loss, severe allergic reactions, thyroid conditions and diabetes.
If simple lifestyle changes don’t improve low blood pressure, medications are prescribed. They include alpha blockers, diuretics (or water pills), beta blockers, antidepressants, and other drugs.
Special: Blood Pressure Breakthrough From Nobel-Winning Scientist
© 2026 Newsmax. All rights reserved.