The expected side effects after Botox injections are mild. Most symptoms disappear spontaneously within 1-2 days. Complications are rare but may include headache, neck pain, double vision, infection, altered sensation, fainting, allergic reaction, asymmetry, botulism toxicity, muscle weakness, or unsatisfactory results. Dr. Kam carefully reviews each patient’s medical history before the treatments. Having an experienced, board-certified plastic surgeon complete the injections dramatically reduces risks or side effects.