What is Trap Tox or Trapezius Tox?Trap Tox or Trapezius Tox is another cosmetic use for botulinum toxin. Injecting botulinum toxin into the trapezius muscle, at the upper border of the trapezius, can create a smooth shoulder line for their dress as a result of neurogenic atrophy. Muscle mass loss can create the effects of a slimmer and longer