How are you? Smelly urine can be present with a number of causes like diabetes, urinary tract infection, asparagus infection, cystitis, kidney stones and also on using vitamin B supplements.
What is your age? And do you have any accompanying symptoms like burning sensation while passing urine, itching, frequency, urgency, any urethral discharge?
Get a urine examination done and visit a urologist for further assistance.
All the best.