Injectables such as BOTOX and Dysport help eliminate fine lines and wrinkles, and can also in some cases alleviate facial spasms, chronic migraines, and even excessive sweating. Facial injections block certain chemical signals from nerves, essentially smoothing out the facial muscles that cause wrinkles. Injectables only work temporarily, so for lasting results patients will need to come in for regular sessions every three to six months.