Baby 4 bulan flathead

Dah macam2 bantal try, rs bersalah sbb 1st time mom x alert psl flathead. Baby plk mmg xgemar tummy time wpun dh train since 1st month lg. Ramai advice suruh urut kepala baby, tp sy xberani. Baby br nk masuk 4 bulan, kepala baby dah tak lembut kan? Or mmg take time utk dia jd bentuk normal semula?