Does botox for migraine cause hair loss?

No botox cannot cause hair loss.  I suggest you see a hair loss expert to evaluate the area.  Best, Dr. Emer.

There is no known linkage between Botox and loss of hair. Your primary physician/internist may be able to identify a nutritional, hormonal, or medical condition that may be leading to the hair loss.

Not likely. In fact, there are some cases where Botox may help thinning hair. Please discuss your hair loss with your primary care doctor. Nutritional, hormonal, and other medical conditions can cause hair loss.