Frown lines are those veritcal lines between your eyebrows that occur when you are concentrating very hard. Often referred to as the "eleven sign" because it looks like the number 11. I think you are talking about the horizontal lines on the forehead. In either case moisturizers are the first step. Make sure you are well hydrated as well as dehydration will cause those lines to remain much longer. There are other causes as well, such as skin sensitivity to creams and lotions, tanning, smoking, etc. So, there are many things you can do (stop tanning, stop smoking) which you can do to help yourself. At the medical level retin A would be a good addition to your regimen. Botox can be done later if needed. Good luck.