*Comprehensive Rehabilitation of Patients with Facial Expression Asymmetry and Synkinesis… DOI: http://dx.doi.org/10.5772/intechopen.106694*

asymmetry occurs on the opposite side (**Figures 6**–**25**). The patients get informed about this phenomenon prior to the treatment. The effect of botulinum toxin gets ceased, approximately, within 3–4 months. During this period, paretic muscles significantly restore their activity. Thus, the data obtained indicate a higher efficacy of botulinum toxin therapy in patients in the acute phase of Bell's palsy.

We should note that in some patients suffering from the facial expression asymmetry, there was observed a poor recovery of the paretic muscles. This was registered both among patients of group I (20%) and among patients of group II (38%).

**Figure 6.** *Bell's palsy. Patient B. before injections.*

**Figure 7.** *Patient B, 1 month after injection.*

**Figure 8.** *Bell's palsy. Patient B. before injections.*

**Figure 9.** *Patient B, 1 month after injection.*

Unfortunately, we were unable to identify predictors of the efficacy of botulinum therapy for patients with facial neuropathy. However, given the data obtained on a statistically significant improvement of the condition of the majority of patients studied, we believe that every patient with a damaged facial nerve should be offered to receive botulinum toxin injections. Other adverse events of botulinum therapy include temporary dryness of the eye on the side of the injection, which may occur after the drug is injected into the orbicularis oculi muscle.

*Comprehensive Rehabilitation of Patients with Facial Expression Asymmetry and Synkinesis… DOI: http://dx.doi.org/10.5772/intechopen.106694*

**Figure 10.** *Bell's palsy. Patient B. before injections.*

**Figure 11.** *Patient B, 1 month after injection.*
