When your pediatrician mentions therapy for your baby, you might hear "OT" and "PT" used almost interchangeably. They are not the same thing. Physical therapy (PT) focuses on how your baby moves their body through space — rolling, sitting, crawling, standing, walking. Occupational therapy (OT) focuses on how your baby uses their hands, processes sensory information, and performs functional tasks like feeding and grasping.
Think of it this way: PT helps your baby get to the toy across the room. OT helps your baby pick it up, manipulate it, and not become overwhelmed by its texture or sound. For a deeper look at how these two skill categories develop, see our guide on gross motor vs. fine motor milestones. Both are important, and the distinction matters because the wrong referral wastes time.
For infants specifically, the overlap is real. Torticollis, for example, might be treated by a PT (for neck range of motion and head positioning) and an OT (for feeding difficulties caused by the positioning issue). Low muscle tone might start with PT to build strength and progress to include OT once fine motor skills become relevant. Understanding what each therapy addresses helps you ask the right questions and get the right help.