Any time we touch someone with a needle there can be injection site discomfort, and some local redness, but these are small risks. Botox has specific risks, such as occasional headaches; and sometimes you can get eyelid or eyebrow heaviness, but that’s most commonly seen in people who are straining their forehead, and using muscles or holding their eyelid or eyebrow up. It’s not really a side effect, but more of an unmasking of something the muscles were compensating for. If we relax their entire forehead and things tend to drop, they may need surgery instead to remove excess skin. A lot of the time, if the forehead is treated in an overly aggressive way, and every line is removed (especially the lower 1/3 of them), that is usually when that complication occurs.