A burning sensation while urinating after having sex is a common symptom among people, irrespective of their age. If you are experiencing the same, know that you are not alone. In most cases, vaginal and penile burning results after insufficient lubrication or friction. In females, it is quite common after the postpartum period and menopause.
Urethra is the tube that is responsible for emptying the bladder by carrying urine outside of the body, and irritation of the same during penetration can lead to a burning sensation while urinating.