Is Hourglass Deformity (Hollowing in the Temples) Seen in Cosmetic Use or Only Migraine Treatment?

The so-called hourglass defect is caused by injecting BOTOX into the temporalis muscle in the temple area to reduce muscle activity.  The treatment causes muscle atrophy and temple hollowing.  Cosmetic treatments do not treat this deeply and are not associated with the hourglass defect.

Thank you for your question. Botox in the temporalis muscle area is usually not injected for cosmetic reasons. Hollowing of the temples is usually due to volume loss and fillers such as Sculptra can be used to fill it in. I would recommend being treated under the supervision of a Board Certified Dermatologist or Plastic Surgeon for safest and best treatment option. I hope this helps.

I haven't read the referenced article, but I wouldn't say that cosmetic Botox injections are a cause of "hourglass deformity" at the temples as it's an area not typically treated cosmetically, with Botox. It's true that Botox causes muscle atrophy in large doses and I'm guessing that the relief from migraines often outweighs the "deformity." There are plenty of options to treat the volume loss in the temples.

When used as a functional treatment then it is possible that you could experience some degree of atrophy of the muscle.  This is not something that is seen clinically when injecting Botox for cosmetic use.  

Botox is used to weaken muscles.  When used cosmetically, we place the medicine so it will weaken the muscles which create wrinkles.  When treating migraines, the doctors are treating the muscles which trigger the migraines.  In the article you referenced, doctors were treating the temporalis muscles, which are used for chewing.  If the muscles are treated repeatedly, the muscles weaken and get smaller (atrophy)

Since this area (temporalis muscle) is never routinely treated for cosmetic reasons, you should never get an hourglass deformity from cosmetic Botox treatments.  

Some people are naturally hollow in the temples, and using treatments like Sculptra to add volume in the temples can be an important part of a facial rejuvenatation.  As a side note, sometimes we use the muscle atrophy caused by Botox to our advantage, like when we treat the jawline with Botox to get a slimmer facial profile.