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.
1 Muscle pain is a somatic pain. 2  Chronic muscle pain is more than a strained muscle. 3  Your muscles may have a chronic muscle spasm that causes them to be tense. 4  This form of muscle overload can cause long-lasting pain, especially in the back. Chronic muscle pain is more than a strained muscle. 2  Your muscles may have a chronic muscle spasm that causes them to be tense. 3  This form of muscle overload can cause long-lasting pain, especially in the back.