The treatment is suitable for smoothing expression lines in the lower forehead area between the eyebrows. The botulinum toxin is injected with a very thin needle into the area to be treated. Only tiny dosages are used, which are individually adapted to the skin condition and the desired result. The treatment is almost painless. However, if desired, local anesthesia can further reduce the puncture effect. After about three to seven days, the affected area of skin appears plumped, smoothed and tightened.