Vertical lines on the nose can be caused from two muscles – the procerus and the nasalis muscles. When we frown, the procerus muscle in between the brows pulls down, causing a vertical line, over time. This generally doesn’t happen when you smile, but may be attributing to the lines on the nose and can be treated with anti-wrinkle injections.
The other main muscle that causes the lines when you smile is the nasalis. Sometimes, when the upper 3 areas of the face (forehead, frown and crows feet) are treated with anti-wrinkle injections, we will use the next muscle that has movement, for facial expression. If you haven’t had the upper face treated with anti-wrinkle injections, some people just naturally use this muscle when they smile. These are often referred to as the “bunny lines”, and can also be treated with anti-wrinkle injections. Depending how strong the muscle is, it usually has 2-4units injected per side of the nose. It is typically just one injection per side, start working in 1-5 days after injection, continue to work for 2 weeks and last up to 3 months.
If the lines are static lines, which means the lines are there, even when you’re not contracting the muscle, they will probably still be there after injection, but softened and preventing them from getting any deeper. Skin resurfacing treatments such as fractional laser, radio frequency, peels and dermapen are other modalities to treat static lines, as this is not a safe area to inject dermal fillers.