While waking up once in a while during the night to use the bathroom is common, doing so frequently may signal a deeper health issue—particularly involving the heart, researchers suggest.

Frequent nighttime urination, medically known as nocturia, refers to waking up more than once during the night with a strong urge to urinate. It’s often associated with conditions such as diabetes, urinary tract issues, or an enlarged prostate. However, growing evidence shows that nocturia may also be linked to heart disease, especially heart failure.

Heart failure occurs when the heart is unable to pump blood efficiently throughout the body. According to the NHS, this does not mean the heart has stopped working, but rather that it needs support to function properly. It is a long-term condition that typically worsens over time and can affect people of all ages.

One study conducted in Japan involving 1,882 participants found that 1,295 individuals woke up at least once per night to urinate. Researchers observed that these participants had a 40% higher likelihood of hypertension (high blood pressure). However, researchers also noted an important factor: Japanese diets tend to be high in sodium. On average, salt intake in Japan is around 10 grams per day, which is significantly higher than in many other countries.

High sodium intake and hypertension are well-established risk factors for cardiovascular disease, heart failure, and stroke, making nocturia a potential warning sign rather than a harmless inconvenience.

Other research suggests the connection between nocturia and heart failure may be even more complex. Frequent nighttime urination disrupts sleep, preventing deep, restorative rest. Poor sleep quality has been consistently linked to an increased risk of heart disease, as well as diabetes, obesity, and metabolic disorders.

In short, while nocturia is often dismissed as a minor annoyance, persistent nighttime bathroom trips may be your body’s way of signaling an underlying cardiovascular issue. If it happens regularly, medical experts advise not ignoring it—especially when combined with fatigue, swelling, or shortness of breath.