15 Return of muscle mass purpose is gradual, generally three to four months after treatment. Subsequent treatment is advised when muscle mass contraction is visible from the treatment space before facial lines return for their pretreatment physical appearance.28 After a number of treatments, botulinum toxin effects can be extended and, https://dermalfillers17406.thenerdsblog.com/35757705/the-greatest-guide-to-dermal-fillers-near-me