I cannot see this being a good idea, not to mention the cost would be outrageous! Ice, compress, and rest is what I'd recommend.
Can Botox Be Used for Shin Splints?
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Botox and shin splints
Treating shin splints with cosmetic Botox isn't practiced in our facility-and isn't something I've read or ever heard of. Rest is what I would recommend.
Shin splints and Botox
There is no scientific articles that suggests that Botox can be used for shin splints. i suspect it would be prohibitively expensive and not necessary. Leg rest and orthotics and RARELY surgery helps