Lips filler treatments are becoming very popular.  If administered properly by well-trained injectors, they are safe and reliable, and give satisfying effects.  Some clients find they last up to one year.  Two possible treatment options are Juvederm Ultra Smile and Juvederm Voluma.  The Voluma is a little more expensive but with enhanced and longer-lasting effects.

Here is a very helpful article:

http://www.cosmopolitan.co.uk/beauty-hair/a42363/things-to-know-before-getting-lip-fillers/