I had Botox done for my forehead lines. How long does this tightness and heaviness last?

Some people do feel tightness and heaviness after the initial injections, it seems to only last a week or so then the brain gets used to the new relaxation of the muscles.

Botox is a great injection for treating forehead lines.  However, you can sometimes feel that the forehead is tight or heavy.  This may be product placement or the amount of product that was placed.  As the Botox wears away you will feel relief from this side effect.  It can take anywhere from a month to soften and up to four months to resolve completely.  If "baby" Botox is used, there is less of a chance of this side effect.