My daughter is 1 year now since birth she tilt her head on right side bring it up to her pediatrician he said her muscle fine .i finally talk to a pt she send pics she definitely see the tilt i refer to pt .she crawl pull up stand walk along sofa .

Some possibilities: Some infants develop a shortening of the sternocliedomastoid muscle after the trauma of a vaginal delivery. PT helps these. Some will have an abnormality in the vertebrae of the neck & have that lean for their life. Unless this is studied with appropriate x-rays and or exam by a doc with training in this area little can be said about the true problem.