What happen to baby at 4 month holding his head one side all the time?

If a 4-month-old baby consistently holds their head to one side, it may indicate a condition called torticollis, where the neck muscles are tight on one side, causing the head to tilt. This can sometimes be associated with positional preferences or developmental delays. It's crucial to consult a pediatrician for an appropriate assessment and potential treatment options, such as physical therapy, to encourage proper head movement and prevent further issues. Early intervention can help ensure healthy development.