Risk of Botox Migration in Face

While there have been reports of distant migration of Botox or Dysport from injection sites, it is exceedingly rare. The key is not to massage the botulum toxin injection sites for 12 hours to minimize risk of migration. A more common Botox or Dysport migration happens on glabellar forehead injection where there can be occasional droopy upper eyelids that could last 4 weeks.

It's very unlikely that the lip issues you are seeing would be related to Botox migration, especially since you are not describing any brow or eyelid droopiness. It is more likely the lip issues are related to the trauma of the Radiesse injections. If the issue has not resolved in 2 weeks, go back to see your practitioner again or see another physician for a second opinion.

If the procerous muscle was targeted and Botox was placed low in the glabella there is a possibility of migration inferiorly affecting the vertical muscle going from the lateral aspect of the nasal bones down to the upper lip called the levator labii superiors alaeque nasi muscle.  Paralysis of this muscle would result in the symptoms you have related.  I have injected thousands of patients with Botox, Dysport and Xeomin and have not seen this complication but years ago I did see a patient who was injected by another physician who had your exact symptoms.  Your issues will likely resolve over the next 3-4 months with resolution of your neurotoxin.  Best of luck to you.

Botox Cosmetic may migrate partially to affect other facial muscles which were not intended. Normally, small doses of Botox are injected at very specific sites to affect specific muscles to improve facial wrinkles. Occasionally, this Botox moves a bit away from the injection site and weakens other muscles.
Most commonly the upper eyelid becomes droopy after Botox injections in between the eyebrows or Crow's feet. It's important not to massage the face immediately after Botox treatment. Crow's feet Botox treatment may also affect the smile & upper lip movement too.
Unintended facial weakness from Botox treatment will recover. Muscle activity returns once the Botox activity is gone, which is usually 3-4 months.

Based on my experience, I have injected thousands of patients with Botox and have never had a patient with upper lip issues from injection of Botox in the forehead. Five days after Radiesse in the nasaolabial fold, you can still experience swelling that will resolve and improve the upper lip.