Could Insomnia Be Raising My Blood Pressure? September 4, 2026 Could Insomnia Be Raising My Blood Pressure? If you regularly lie awake at night, the effects may extend well beyond feeling tired the next day. Research points to a relationship between insomnia and high blood pressure, also known as hypertension, particularly when sleep problems are frequent or ongoing. Insomnia can look different from person to person. For some, it's trouble falling asleep. For others, it's waking through the night, rising too early, or simply never feeling like their sleep did the job. Researchers are still working out exactly how insomnia and blood pressure interact, but the evidence increasingly suggests it's a two-way relationship, where each can make the other worse.1 What happens to blood pressure while you sleep? Sleep gives your cardiovascular system an important chance to recover. During healthy sleep, blood pressure normally falls as your body settles into a more restful, lower demand state. When you're not getting enough sleep on a regular basis, that natural dip can be disrupted. Adults are generally advised to get around seven to nine hours a night, and consistently sleeping six hours or less has been associated with higher blood pressure over time.2 The more nights this pattern repeats, the more it may interfere with the processes your body relies on to keep blood pressure in a healthy range, gradually increasing the risk of hypertension. Why could insomnia raise blood pressure? One explanation researchers point to is a state known as physiological hyperarousal. In simple terms, the body stays more alert and switched on than it should be, even when it's meant to be winding down for rest.3 This heightened state has been linked to increased activity in the sympathetic nervous system, the part of the body involved in the stress response.3 When this system is overactive, blood vessels can narrow and blood pressure can rise. Insomnia may also throw off the normal rhythm of cortisol, a hormone that plays a key role in how the body manages stress.3 These mechanisms may help explain why studies keep finding a connection between insomnia and hypertension. One large study found that people with insomnia had an increased risk of developing high blood pressure, though researchers are quick to note the relationship is complex, and there's still more to learn.3 Can high blood pressure affect your sleep too? Interestingly, this connection doesn't just run one way. Research also suggests that people with hypertension may be more likely to develop insomnia, which means the two conditions can end up reinforcing each other over time.1 Don't ignore ongoing sleep problems Everyone has the odd restless night, and that's nothing to worry about. But when insomnia becomes a regular pattern, it's worth paying attention to. Small changes can help, like keeping consistent sleep and wake times, staying physically active during the day, and building a relaxing wind down routine before bed. If you regularly struggle to fall or stay asleep, wake earlier than you'd like, or keep feeling tired despite a full night in bed, it's worth speaking with your doctor. Getting to the bottom of an underlying sleep problem could be an important step towards protecting both your sleep and your long-term cardiovascular health. References 1. Liu, Dingwei, et al. “The Association between Hypertension and Insomnia: A Bidirectional Meta-Analysis of Prospective Cohort Studies.” International Journal of Hypertension, vol. 2022, Dec. 2022, p. e4476905, https://doi.org/10.1155/2022/4476905. Accessed 11 Aug. 2026. 2. Jarrin, Denise C., et al. “Insomnia and Hypertension: A Systematic Review.” Sleep Medicine Reviews, vol. 41, Oct. 2018, pp. 3–38, https://doi.org/10.1016/j.smrv.2018.02.003. Accessed 11 Aug. 2026. 3. Li, Yun, et al. “Insomnia With Physiological Hyperarousal Is Associated With Hypertension.” Hypertension, vol. 65, no. 3, Mar. 2015, pp. 644–50, https://doi.org/10.1161/hypertensionaha.114.04604.
