Inquiry about forehead Botox.

I have an inquiry about forehead Botox. I do have an M-shaped hairline, but despite that, I really want to have a beautiful, plump forehead. I heard that injecting Botox makes the forehead look a bit more three-dimensional, so I think it would look better. I am also considering whether a more contoured forehead might make my facial features stand out more clearly. I would like to know how long the effects of forehead Botox last, when I can wash my face, whether I can apply makeup or sunscreen, and if it is safe to expose myself to sunlight after the procedure. I would also like to know the approximate amount of pain and swelling, the dosage and price, and the frequency and number of sessions. Additionally, I am concerned that it might be too obvious that I had the procedure done; I am wondering if the effect might wear off too quickly if done naturally without being noticeable. Finally, I have atopic dermatitis and sensitive skin, so I am curious if this will be safe for me.