What is the difference between small face needles and thin face needles?

Small face needle thin face needle is actually a kind of ingredient, botulinum toxin, the name is the promotion made by the merchant, botulinum toxin injection can paralyze part of the facial hypertrophic masseter muscle, so that the muscle shrinks to achieve the effect of thin face, botulinum toxin after injection will weaken with the extension of time, generally can maintain about 6~8 months.