Some patients with hypertension have excessive nocturia, and the causes should be analyzed specifically in the context of the patient’s specific situation. If the occurrence of hypertension is accompanied by an increase in nocturia and relatively little urination during the day, and is accompanied by headache and weakness of the limbs, especially if some patients experience weakness of both lower limbs and fall, this should be considered as a clinical manifestation caused by endocrine diseases, namely primary aldosteronism. If a patient with long-term high blood pressure has recently developed nocturia with some specific abnormalities in urinalysis, it may suggest early onset of impaired renal function due to hypertension, and a physician should be sought promptly to protect renal function while reasonably controlling hypertension. In addition, there are some female patients with hypertension with urinary tract infection who present with increased nocturia and not much daytime urination. Both during the day and at night, they have an increased number of urine but not much urine, along with symptoms such as urinary urgency and painful urination. Elderly patients with prostatic hypertrophy may also experience increased nighttime urination and not much daytime urination, as well as symptoms of thinning and interruption of the urine stream, and a feeling of incomplete urination.