A blood pressure of 105/58 falls within the normal range and is generally a healthy reading. The American Heart Association defines normal blood pressure as below 120/80 mmHg, and your top number (105) clears that threshold comfortably. Your bottom number (58) dips just under 60, which is worth understanding, but on its own this doesn’t classify as low blood pressure.
Where 105/58 Falls in the Official Categories
The 2025 guidelines from the American Heart Association and American College of Cardiology break blood pressure into four categories:
- Normal: below 120 systolic and below 80 diastolic
- Elevated: 120 to 129 systolic with diastolic still below 80
- Stage 1 hypertension: 130 to 139 systolic or 80 to 89 diastolic
- Stage 2 hypertension: 140 or higher systolic, or 90 or higher diastolic
Your systolic pressure of 105 is solidly normal. The diastolic reading of 58 sits just below the 60 mark that some definitions use as a lower boundary. The National Heart, Lung, and Blood Institute defines low blood pressure as a reading below 90/60, meaning both numbers need to be in that range. Since your systolic pressure is well above 90, a reading of 105/58 doesn’t meet the clinical definition of hypotension.
Why the Bottom Number Matters
The diastolic number (the bottom one) reflects the pressure in your arteries between heartbeats, when your heart is resting and refilling with blood. A diastolic reading of 58 is on the lower side but not inherently concerning. Many healthy people, particularly younger adults and those who exercise regularly, naturally run a lower diastolic pressure without any problems.
Where it becomes relevant is if that number drops further over time or you start experiencing symptoms like lightheadedness, blurry vision, fatigue, or feeling faint when you stand up. Those symptoms signal that your organs may not be getting enough blood flow. A reading of 58 without any of those issues is typically just your body’s normal baseline.
Your Pulse Pressure Is Normal
Pulse pressure is the gap between your top and bottom numbers. For a reading of 105/58, that gap is 47 mmHg. A normal pulse pressure is around 40 mmHg, so 47 is in a healthy range. Pulse pressures of 50 or above start to carry slightly higher risks of heart disease, irregular heart rhythms, and stroke. At 47, you’re below that threshold. A pulse pressure that widens to 60 or more, or narrows to less than one quarter of the top number, is worth discussing with a provider.
Why Some People Naturally Run Lower
If you’re physically active, a reading like 105/58 is especially common. Endurance exercise makes the cardiovascular system more efficient over time. Regular training lowers the activity of the nervous system signals that constrict blood vessels, with fit individuals showing roughly 29% lower levels of the stress hormones that drive blood pressure up. The kidney-based system that regulates long-term blood pressure also dials down by about 20% with consistent exercise. The result is a lower resting blood pressure that reflects a well-conditioned heart, not a problem.
Beyond fitness, body size plays a role. Smaller-framed people and younger adults tend to have lower blood pressure readings as a baseline. Women before menopause also commonly see numbers in this range. If 105/58 is consistent with what you’ve seen on previous readings and you feel fine, it’s simply your normal.
When a Lower Reading Deserves Attention
Context matters more than any single number. A blood pressure of 105/58 after a long day in the heat, a skipped meal, or not drinking enough water could reflect mild dehydration. When your body loses fluid, blood volume drops, and blood pressure follows. Your body tries to compensate by releasing hormones that constrict blood vessels, but if the fluid loss is significant enough, pressure still falls.
Certain medications can also push readings lower. Blood pressure drugs, some antidepressants, and medications for prostate conditions all have blood pressure lowering as either a primary effect or a side effect. If you recently started a new medication and your readings have dropped, that connection is worth noting.
The key distinction is between a number and how you feel. A blood pressure of 105/58 with no symptoms is a good reading. The same number paired with persistent dizziness, unusual fatigue, difficulty concentrating, or near-fainting spells tells a different story. Symptoms are what turn a normal-range reading into something that needs investigation.
How to Get an Accurate Reading
Blood pressure fluctuates throughout the day, so one measurement is just a snapshot. If you’re checking at home, sit quietly for five minutes before measuring. Keep your feet flat on the floor, your arm supported at heart level, and avoid caffeine or exercise for at least 30 minutes beforehand. Take two readings a minute apart and average them.
If your diastolic number occasionally dips below 58 but other readings are higher, the occasional low number is likely meaningless. A pattern of readings consistently below 90/60 with symptoms is what moves the needle from “normal variation” to something worth investigating. For a single reading of 105/58 in someone who feels well, this is a blood pressure most people would be happy to have.