Yes, tanning will always make freckles get worse. Lying in the sun is really what makes freckles become worse. Going in the sun a lot during the period when you're getting treated for freckles with laser also makes it much more difficult for the treatment to work.
The information contained in the above article
is purely for educational purposes and is not intended to provide
any medical advice. Always consult with your physician before having
any medical procedure performed.