If you’ve always had it, then its probably nothing to worry about
This may be a bit personal to ask but is it very pungent? Often, smell is a sign of infection. If there is a strong odour; then there may be a problem
I suggest going to your local chemist for advice, they’ll be able to advise if you may need something over the counter for it – or if it is something you need to have checked by your GP.
Hope that helps. Good luck and try not to worry.