welcome to HealthcareMagic
The cough that comes on every 5-6 months can be allergic cough
which may come along with cold .As for the dribbling of urine after bath please see if this problem is just after bath or it happens some times during the whole day also.The best thing you can do is to consult a Urologist
to get examined to rule out incontinence
of urinary bladder
or some other cause .It is important to get treated for urine the cough if allergic can be treated later also.