I am sorry that your question was not unanswered for long.
Despite the long traumatic experience in childhood and early adulthood, a proper treatment is likely to resolve the issue. Thus it is not permanent. The causative factors are not much different than the childhood bed wetting.
Following are the causes for bed wetting termed as enuresis;
2) night time increased frequency (termed nocturnal polyuria)
3) nocturnal decreased capacity of the bladder
4) diabetes mellitus; if there is a family history
5) idiopathic; when no cause is ascertained
Two major intervention can be done;
1) practicing the increased urine holding time in the day.
2) limiting the fluid 3 hours before bed time and voiding immediately before going to the bed (which you are already doing).
You may also be given a trial with Flavoxate (Urispas), which is an oral medicine. This decreases the bladder spasm. If this is not effective than the trial is given to Desmopressin and alarm system with the above measure. If these medications / measures too are not effective; an examination by a urologist and following investigations may be contemplated;
Urodynamic studies and cystoscopy
MRI of the spine
The urodynamic studies needs to be performed during sleep, if not done already. This can demonstrate whether there is abnormal pelvic floor activity during the sleep. Usually this is diagnostic. Urodynamic studies during sleep demonstrate a relationship between nocturnal enuresis and pelvic floor activity. When pelvic floor activity increases in association with detrusor (bladder muscle) contractions, wetting is usually avoided, and the individual would often awaken subsequently to void. In contrast, when pelvic floor activity did not increase, the detrusor contraction (bladder muscle) usually is associated with a wetting episode. Whether abnormally deep sleep contributes to enuresis is not substantiated. Unrecognized underlying medical disorders like, sickle cell disease, diabetes mellitus, diabetes insipidus, hyperthyroidism also needs to be looked for by the blood investigations. Delayed bladder maturation, small functional bladder capacity, diminished vasopressin release, and poor arousal from sleep (alone or in combination) may contribute to nocturnal enuresis (bed wetting).
Please feel free for your follow up questions.
I would be happy to assist you further, if you need any more information.
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