Plagiocephaly, also called positional molding or deformational plagiocephaly, is a very common condition in which one or more areas of a baby’s head become flattened. Babies with plagiocephaly typically also appear to have sloping or bulging foreheads, and their ears may appear to be tilted. Plagiocephaly is not dangerous, does not affect brain development or function, and usually does not require treatment. This brochure explains what causes plagiocephaly, and what parents should do.