Benign Prostatic Hyperplasia (BPH): This condition is very common in older men and can cause urinary frequency, urgency, and nocturia due to obstruction of the urethra by an enlarged prostate.

Overactive Bladder: A condition characterized by a sudden, intense urge to urinate, which can lead to nocturia. It's common in older adults and can be managed with lifestyle changes and medication.
Diabetes Mellitus: Both type 1 and type 2 diabetes can cause nocturia due to the high glucose levels in the blood, leading to increased urine production.
Sleep Apnea: This condition can lead to increased urine production at night, causing nocturia. The mechanism is not fully understood but may involve changes in intrathoracic pressure affecting renal function.
Chronic Kidney Disease: As kidney function declines, the ability to concentrate urine decreases, leading to increased urine volume and nocturia.

Urinary Tract Infection (UTI): While less common in men than women, UTIs can cause severe symptoms, including nocturia, and if not treated, can lead to more serious complications like sepsis.
Bladder Cancer: Although less likely, bladder cancer can cause nocturia among other symptoms like hematuria. It's crucial to rule out this diagnosis, especially in smokers or those with a history of exposure to certain chemicals.
Heart Failure: Nocturia can be a symptom of heart failure due to increased fluid redistribution and increased renal perfusion at night, leading to increased urine production.

Diabetes Insipidus: A rare condition characterized by the inability to regulate fluids in the body due to problems with the antidiuretic hormone (ADH), leading to excessive thirst and urination.
Sleep Disorders (e.g., Insomnia): Certain sleep disorders can lead to the perception of nocturia or actually cause it due to increased awakenings.
Neurological Disorders (e.g., Multiple Sclerosis, Parkinson's Disease): These conditions can affect bladder control and lead to nocturia among other urinary symptoms.