The inveniton relates to a method for automatically detecting neck stiffness of passengers in automobiles. A camera mounted in a motor vehicle cabin monitors an upper body and/or face of a vehicle occupant. A computer unit applies pattern recognition methods to compare an image from the camera with reference data stored in a database, and to determine based on the comparison that the occupant is experiencing neck discomfort. The neck discomfort determination is made based on the comparison indicating a change in occupant posture, a change in occupant facial expression, and/or a relaxation movement of the upper body and/or of a head of the occupant. If neck discomfort is detected, warm air and/or infrared light is directed toward the affected neck area to alleviate the discomfort.