Plagiocephaly (one sided flatness). Does he need a helmet?

Da

My son just turned 5 months and he has torticollis which caused his flatness to happen. I’ve been going to a chiro who treats his torticollis and performs craniosacral therapy (basically shaping the head). I have also been repositioning him which I couldn’t before because his torticollis was too bad.

I am wondering if I should make an appt to get a helmet or not. I’m not sure how fast acting this chiro stuff is and I don’t want to miss my window. Has anyone experienced a similar situation and can give me some suggestions? Thanks!