No, Botox will not cause bags under your eyes. On the contrary, Botox can treat them to some degrees. As we know that Botox is far better equipped to treat the lines at the side of your eyes which are known as crow's feet and this is the basic function of it. And in some cases a combination of Botox and dermal fillers can improve their appearance. But on the other hand, it really does depend on the extent of bags under the eyes, so that it can treat bags. Besides, there are many factors which can cause the bags under your eyes, such as the age, genetics, allergies, and lack of sleep. So you can have a good and relaxing rest, which is a good way to treat eye bags. Also, you can put cucumbers on your eyes and use Witch hazel.