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.
The most common causes of muscle pain are tension, stress, overuse and minor injuries. This type of pain is usually localized, affecting just a few muscles or a small part of your body. Systemic muscle pain â pain throughout your whole body â is more often the result of an infection, an illness or a side effect of a medication. Common causes of muscle pain include: Chronic exertional compartment syndrome. Chronic fatigue syndrome.
The symptoms of a muscle strain do vary depending on severity, but generally the following occurs: 1  A sudden pain or feeling that the muscle has tightened. 2  Contraction of the muscle usually causes pain. 3  There will be an area of the muscle which is tender to touch.