I had Botox injected 4 weeks ago and it has left me with an indented scar at the injection site. How can I fix? (photo)

Thank you for your question and for sharing your photographs.  Though Botox injections do not cause scarring it can cause some asymmetry function of the muscles injected that can lead to an irregular forehead appearance.  I would see your injector for an exam, they can explain the cause of the indentation and ensure that it is a temporary effect of the botox that may be treated with additional treatment into any muscle still working.  

Thanks for your query. Scarring after Botox is something unheard off. You should see your injector and discuss about it. 4 weeks isn’t that late but the sooner you go the better it is.All The Best