It is difficult to determine whether a child is having a behavioral tantrum or a sensory meltdown. This article from Understood.org offers a good explanation and some strategies for coping with both. Ultimately, if as a parent or caregiver, you are having a difficult time sorting or discerning the difference between behavior and sensory overload, a Sensory Assessment by a Pediatric Occupational Therapist can be helpful. Here is the link:
Lizette Alexander OT Reg. (Ont)