Without knowing the specifics regarding your treatment, and without photos, it will be difficult to appreciate your concern. However, there are fairly common adverse effects that can be seen with botox (or dysport) treatment to the forehead and frown area. One of the most common side effects I have seen occur after treatment of the frown area and forehead is drooping of the brow. This can occur if the dose injected is excessive in the central forehead. This effect occurs because the forehead muscle (frontalis muscle), which is the only muscle to lift the brows, is weakened. When the brows descend, it can create a tired-look as there is excess accumulation of skin over the upper eyelids; the eyelid creases also appear to descend, creating the appearance of "small eyes". The effect of botox tends to reach a maximum at around 2 weeks, and then persists for 3 months on average. Occasionally, the brows can descend early on and then "pick up" as the remaining frontalis muscle attempts to compensate for the botox effect. In the end, you can rest assured that the effect will begin to wear off in several weeks and the brows will gradually elevate. If your provider cannot acknowledge this, then I recommend that you seek a second opinion for future re-treatment such that this effect can be avoided. I would also recommend starting with a lower dose to the forehead, such as 10 units and gradually increase if necessary. It's always okay to add a bit more if some lines persist, but once you knock out most of the muscle, you have to wait an average of 3 months for the effect to disappear. Best of luck!