We all wish the smooth results of Botox would last forever, unfortunately, Botox does eventually wear off.
One visible sign that Botox is wearing off, is the gradual return of expression lines caused by muscle activity in the Botox treated area.
Botox lasts 3-4 months in most patients, but can vary from one person to another.
Botox works on paralyzing muscles, the stronger a muscle is, the more it will resist and metabolize Botox. Those patients with exceptionally strong muscles will need more units and may need to be re-injected earlier. Athletes are a perfect example as they tend to metabolize Botox at a faster rate.
Studies have shown that when muscles are not allowed to function for about 2 years, there is atrophy, which may influence how often Botox injections are needed.
If one maintains their Botox treatments regularly as recommended by the manufacturers of Botox, the duration between treatments may last longer than 4 months.