Occasional bedwetting in older men may be caused by physiological factors such as excessive stress and drinking too much water, or it may be caused by prostate hyperplasia and acute bacterial cystitis. 1. Physiological factors: If a man has too much mental stress during the day at work or study, or if he drinks too much water at night before going to bed, he may experience occasional bedwetting. This is a normal physiological phenomenon, and the symptoms will usually improve after relaxing or reducing the amount of water consumed before going to bed. 2. Prostatic hyperplasia: The cause of prostatic hyperplasia is still unclear, and it is considered to be related to the imbalance of sex hormone levels in the body after ageing. Patients will appear urinary frequency, increased residual urine, etc. In addition, prostate hyperplasia will lead to lower urinary tract obstruction, thereby triggering changes in the function of the forced urethral muscle, the patient will be manifested in urinary frequency is more pronounced, as well as the symptoms of urge urinary incontinence. Therefore, older men with prostate enlargement may exhibit occasional bedwetting. 3. Acute bacterial cystitis: Acute bacterial cystitis may be caused by urethral stenosis, priapism, urinary calculi, prostatitis and so on. Patients will have urinary pain, urinary frequency, urinary urgency and other manifestations, some patients will appear in severe cases of urge incontinence, so men with acute bacterial cystitis, will be manifested in occasional bedwetting. It is recommended that men with occasional bedwetting need to seek medical attention in a timely manner, if it is caused by physiological factors, do not need to be treated. If it is caused by a disease, it needs to be treated for the cause of the disease.