Am I a good candidate for Botox? I have enlarged temporalis muscles on my forehead giving me an odd head shape. (Photo)

Your forehead looks fine based on your photos. I do not think the temporalis muscle is hypertrophied although it would be helpful to examine you in person. In some patients, the temporalis muscle is hypertrophied. This is usually associated with masseter hypertrophy caused by clenching or grinding of the teeth. If the muscle were enlarged, it could be treated with Botox/Dysport however I do not believe this is your case. 

As  others have mentioned, your forehead  shape is fine, at least from the pics, that  you'd sent.  What stands out more is  your uneven  skin  tone from  acne.  I would take  care of that  in order for it to  look even and smooth. 

I do not detect any significant temporal muscle hypertrophy on your pictures. The temporalis muscles are on the side of your head behind your eyes, not on your forehead. If you do have significant temporal muscle hypertrophy, Botox could easily shrink it after 2-3 visits. I recommend you see an experienced aesthetic physician to determine what is actually causing your concerns.

Although it is difficult to assess your temporals muscle from the photos, the temporals muscle hypertrophy is known to occur, mostly in association with hypertrophy of the masters. This happens frequently in anxious individuals who clench their teeth excessively or in those who habitually chew gum several hours a day. Since temporals muscle is one of the muscles participating in chewing it's prolonged forceful use may results in  hypertrophy. Very seldom you will find reports of isolated hypertrophy  of temporals muscles without masseter muscles involvement.If you clench your teeth excessively than reducing it should lead to slow involution of the muscles; Botox  in the masseter muscles, rather than in temporals muscle could certainly assist in this process. The best advice can be obtained from your Plastic Surgeon. Good luck!

It is very diffilult to tell much from the photo but it appears your temporalis muscles are norma. to try to obtain  what you are seeking see an experienced facial plastic surgeon for a consult

you do not appear to have a hypertrophy of the temporalis muscle. You have a normal temporal fossa and the reasons you looking for are not there. Good luck from New York City

From your pictures I don’t see any dramatic hypertrophic forehead shape.
It can be bone or muscle.
A touch of Botox to the area you perceive as larger might help some if it is thickened muscle.
Best. Dr Brecht
Seattle, Wa