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One common cause of muscle aches and pain is fibromyalgia, a condition that causes tenderness in your muscles and surrounding soft tissue, sleep difficulties, fatigue, and headaches.
1 Mineralocorticoids are hormones that regulate the body's fluid balance, and they may trigger the bloating that occurs with PMS.  Prolactin, a hormone that stimulates breast development and milk production during pregnancy, may cause the breast tenderness associated with PMS.