When plagiocephaly appears, a combination of appropriate postural changes should be made (mainly sleeping on the opposite side, dedicating as much time as possible to being face down doing physical activity on the opposite side to the flattening side, holding it in the arms) and muscle physiotherapy of the neck intensive, daily and done at home apart from the work of the physiotherapist.
After 3 or 4 months of age, depending on the degree of severity, the use of dynamic cranial orthopedic bands must be added to this treatment to restore normalcy to affected patients. Between that period and 12 months of age is when the best results are obtained.
As the infant gets older, the chances of improvement decrease.