Calcinosis cutis is a skin condition characterized by the formation of calcium deposits in the skin and subcutaneous tissues. These deposits can appear as hard, white or yellowish nodules and may occur in various areas of the body. The condition can be associated with underlying diseases, such as scleroderma or dermatomyositis, but can also occur without any known cause. The exact mechanism behind calcinosis cutis involves the abnormal deposition of calcium salts, which can result from inflammation, tissue damage, or metabolic disorders. Treatment options vary depending on the severity and underlying cause, and may include medications, surgical removal of the deposits, or other therapies to manage symptoms.