While high blood pressure often gets the most attention, low blood pressure—also known as hypotension—can sometimes be a cause for concern. For many people, lower blood pressure readings don’t cause symptoms or health issues. However, when blood pressure drops too low, it can interfere with the body’s ability to deliver enough oxygen-rich blood to vital organs, including the brain.
According to Dr. Rick Marasa, MD, MBA, Clinical Advisor of New Wave Recovery, low blood pressure can range from mildly bothersome to potentially dangerous depending on the cause and severity. Recognizing the warning signs early can help prevent complications and ensure you get the care you need. Below, Dr. Marasa shares six of the most common symptoms associated with low blood pressure.
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1. Lightheadedness Or Dizziness
One of the earliest and most common signs of low blood pressure is feeling dizzy or lightheaded, especially when changing positions quickly.
"Most commonly felt after quickly moving from sitting/lying down to standing," Dr. Marasa explains. "This is called orthostatic hypotension."
This sudden drop in blood pressure can make you feel unsteady, weak, or like the room is spinning. Symptoms typically improve after sitting or lying back down.
2. Passing Out Or Nearly Fainting
Fainting—or feeling as though you're about to faint—can be a more serious indication that your blood pressure has dropped significantly.
According to Dr. Marasa, "Passing out or almost passing out" may occur because "your brain may not be receiving sufficient blood flow."
Even if you don't completely lose consciousness, frequent episodes of feeling faint should not be ignored, particularly if they happen repeatedly.
3. Temporary Blurred Vision
Your eyesight can also be affected when blood pressure drops suddenly.
"When blood pressure decreases rapidly there may be temporary changes to your eyesight," says Dr. Marasa.
Some people experience blurry vision, dimming vision, or difficulty focusing. These visual disturbances are often brief but may signal that blood flow to the eyes and brain has been temporarily reduced.
4. Unusual Fatigue Or Extreme Tiredness
Feeling exhausted despite getting enough rest could be another clue that your blood pressure is too low.
Dr. Marasa notes that "blood that is not circulating well may make you feel tired or lethargic."
Because your organs and muscles may not be receiving adequate blood flow, even routine activities can leave you feeling drained or lacking energy.
5. Nausea
Low blood pressure doesn't just affect your head—it can also impact your digestive system.
"You may experience nausea, vomiting, or stomach discomfort with low blood pressure," Dr. Marasa explains.
This symptom can sometimes be overlooked, especially if it occurs alongside dizziness or fatigue, but it may be part of the body's response to inadequate circulation.
6. Difficulty Concentrating Or Confusion
When the brain isn't receiving enough blood flow, cognitive symptoms can occur as well.
Dr. Marasa says that patients may experience "decreased cognitive function due to decreased blood flow to their brain, especially in elderly patients."
You may notice trouble concentrating, brain fog, forgetfulness, or confusion. In older adults, these symptoms can be particularly concerning and warrant medical evaluation.
What To Do If You Have Low Blood Pressure Symptoms
If you're experiencing signs of low blood pressure, Dr. Marasa says it's important to identify the underlying cause. "Many times, dehydration causes low blood pressure," he explains. "Drinking plenty of water increases fluid volume in the body and reduces symptoms."
He also recommends avoiding standing for long periods and eating meals at regular intervals throughout the day. However, low blood pressure can sometimes be linked to more serious conditions, including medication side effects, heart problems, infections, bleeding, or endocrine disorders.
"Low blood pressure can be harmless," Dr. Marasa says, "but if your low blood pressure consistently results in dizziness, fainting, chest pain, shortness of breath, or confusion, you should seek medical attention."
Paying attention to these symptoms and addressing them early can help protect your overall health and ensure your body is getting the blood flow it needs to function properly.
