Botox on Forehead 2 Days Ago, Lips Swelled Today, Why?

If there is distant swelling from a site in which botox was injected, is it a fluid shift, reaction to a numbing cream that was used, an allergic or delayed drug reaction, or a coincidental unrelated disease? It would be extremely rare for a localized, one-sided cheek swelling to be related to an allergic reaction to Botox on the forehead.

Anyone experiencing possible allergic reactions to any medication should notify their doctor immediately and if symptoms worsen take it seriously in case breathing becomes difficult, it would be mandatory to go to the closest emergency department of a hospital or call 911.

It's not likely your lip swelling is related to the Botox injection in your forehead, but from what you describe, you may be experiencing lid ptosis or droop that is a result of Botox getting into your eyelid. Follow up with the provider for a proper assessment and always discuss expectations and potential complications prior to any treatment so you are informed.

Botox injected into the forehead cannot in any plausible way result in swelling of the lips. The Botox cannot migrate, and even if it could, it never causes swelling. You might have an irritant or allergic contact dermatitis on your lips, make sure to speak with your dermatologist for a proper diagnosis.