Linear Scleroderma. Scleroderma is a rare autoimmune disease in which an overproduction of abnormal collagen causes normal tissues to be replaced with thick, dense scar tissue that can affect underlying bones and muscles if left untreated.
Liver pain. Liver pain is felt in the upper right area of the abdomen, just below the ribs. Usually, it is a dull, vague pain though it can sometimes be quite severe and may cause a backache. Sometimes people perceive it as pain in the right shoulder.
The liver and gall bladder are located in the upper right quadrant and could be the cause, but also pain can be referred from other organs like the lung and heart or intestine. You need to see your doctor right away to be examined to determine the cause of the pain and get proper treatment.