Incompetent cervix. During the pregnancy, due to anomalies, it is possible that the cervix opens earlier than it should, being one of the causes of abortion. As a result the woman in question suffers a miscarriage or it is also possible to be faced with premature birth. This is all because the stage of labor is skipped due to the dilation of. Shoulder pain can range from mild to severe and can come on suddenly or build up over time. Shoulder pain causes include fractures, tissue inflammation or tears, joint or ligament instability, and arthritis . Treatment for shoulder pain will vary depending on the specific condition. Treatment options may include rest, medication, and physical.