Why Did I Get an Indentation on Forehead After Botox?

You may be noticing an indentation since your brow is weak and immobile from the Botox. When your forehead is smooth, contour irregularities may be more noticeable. Botox injections do not lead to indentations.

If the area is bothersome, and you're not satisfied by the explanation of your doctor, then certainly get a second opinion from a board-certified, experienced Botox injector.

I hope this is helpful for you.

This is highly unlikely to be permanent and will likely resolve when the botulinum toxin effect dissapates between 3-5 months.

Unfortunately your description does not provide enough information to offer an intelligent guess regarding what is going on. The most common type of issue is a change in how the forehead muscles contract following an unbalanced BOTOX treatment causing new wrinkling in the forehead due to muscle recruitment.