Sudden urinary incontinence in one’s fifties may be caused by physiological factors, acute urinary tract infections, overactive bladder, prostate hyperplasia and other factors. 1. Physiological factors: such as overwork or drinking too much alcohol before going to bed, can lead to sudden incontinence in bed, only occasionally, after eliminating the triggers can be restored on their own. 2. Acute urinary tract infections: acute cystitis, for example, may be related to the lack of attention to lower body hygiene, the infection is more serious, may cause urinary incontinence, will suddenly urinate on the bed, accompanied by frequent urination, urinary urgency, urinary pain and other symptoms. 3. Overactive bladder syndrome: it may be related to estrogen deficiency and bad lifestyle habits, which may cause frequent bladder contractions, and when it is severe, there may be leakage of urine, also accompanied by symptoms such as frequent urination and urgency. 4. Prostatic hyperplasia: When the gland gradually increases in size, it may seriously compress the urethra and make the bladder retain too much urine, which may easily lead to overflow incontinence, and then suddenly urinate on the bed, accompanied by difficulty in urination, urinary weakness, and frequent urination symptoms. If you are in your 50s and suddenly take a nap, and repeatedly take a nap, there may be an abnormality, and it is recommended to seek medical attention as soon as possible.