Botox works by blocking nerve signals in the muscles where it is injected. When those nerve signals are interrupted, the affected muscle is temporarily paralyzed or frozen. Without movement of these selected muscles in the face, certain wrinkles may be softened, reduced, or even removed.
Botox only works on wrinkles that are caused by muscle movement. These are known as dynamic wrinkles, and are often called “expression lines.”
Botox is not a permanent treatment. Repeated treatments are necessary for continued wrinkle-reducing effects. Most people find that the muscle-relaxing effect of Botox lasts for 3 to 4 months.
Botox will not work on fine lines and wrinkles caused by sagging or loss of plumpness in the face. These are known as static wrinkles. Static wrinkles include lines in the cheeks, neck, and jowl areas.
Dermal fillers are substances designed to be injected beneath the surface of the skin to add volume and fullness. Depending on the dermal filler, it can last 6 months to a few years.