For lip filler treatments in Denver and Boulder, we will generally numb the area to be treated prior to making any lip injections. This leaves for a surprisingly easy treatment to tolerate. Another plus, most lip fillers actually contain lidocaine which is a great numbing agent! Once numb, the treatment itself takes about 15-20 minutes. You will be swollen afterwards but the main swelling generally subsides in 48 hours, and ALL swelling generally subsides by one week.