Your neck is twisted to the side all the time.
On each side of the neck there is a muscle that we use to bend and turn our head to the side. In your case the muscle on one side is not working properly. As a result, the muscle has shortened and it is pulling your neck to the side affected. Moreover, your head is also turned to the other side. The face may not be straight due to the head slanting. A thickening in the neck may also be felt. This disorder can be hereditary, for example, which means you were born with it.
Provided by the non-profit organization “Was hab’ ich?” gemeinnützige GmbH on behalf of the Federal Ministry of Health (BMG).