Feldspar is a rock-forming mineral. It is important industrially in making glass, ceramics, enamelware and soaps. It is also used in making bonding material for abrasive wheels, cements, fertilizer, tarred roofing materials and as a sizing or filler in textiles and paper.
Depending upon the cause, muscle pain can be mild or severe and debilitating. Muscle pain is the hallmark symptom of some chronic conditions like fibromyalgia. Related symptoms that can occur with muscle pain are tenderness, swelling, redness, or fever. Medically Reviewed by a Doctor on 3/2/2017.
Muscles cramps are caused by chronic contraction or abnormal toning of the muscles, of which there are three types skeletal, smooth, and heart. Symptoms of muscle cramps include tightness in the muscle, pain, and/or tingling and burning in the affected area.