The most common causes of muscle pain are tension, stress, overuse and minor injuries.
1 Myofascial pain syndrome typically affects muscle in asymmetric areas of the body. 2  The precise cause of myofascial pain syndrome is not known. 3  Myofascial pain syndrome leads to localized pain in the muscle tissue. 4  Poor sleep, fatigue, and stiffness are common in myofascial pain syndrome. 1 Myofascial pain syndrome leads to localized pain in the muscle tissue. 2  Poor sleep, fatigue, and stiffness are common in myofascial pain syndrome. 3  Myofascial pain syndrome is simply diagnosed based on the areas of complaints of muscle pain and associated tenderness upon examination. Myofascial pain syndrome (MPS) is a fancy way to describe muscle pain. It refers to pain and inflammation in the body's soft tissues. MPS is a chronic condition that affects the fascia (connective tissue that covers the muscles). It may involve either a single muscle or a muscle group. Overexertion, pinched nerves -- all sorts of joint and muscle problems can cause neck and shoulder pain. Click here to read more about how shoulder and neck pain are diagnosed and treated. A car accident or any abrupt jerking motion to the head and neck -- and suddenly you have serious neck, shoulder, back pain. You may feel muscle pain in a specific muscle of the body, such as a back muscle or leg muscle, or you may feel more diffuse muscle pain all over, such as when you have the flu (influenza). A person with chest pain who is having a heart attack or angina is feeling cardiac muscle pain. Muscles include skeletal muscles that are attached to bones and contract to move your body. Although we often think of skeletal muscle pain, problems with other kinds of muscle, such as smooth muscle and cardiac muscle, can also cause pain. 1 The precise cause of myofascial pain syndrome is not known. 2  Myofascial pain syndrome leads to localized pain in the muscle tissue. 3  Poor sleep, fatigue, and stiffness are common in myofascial pain syndrome. 1 Myofascial pain syndrome leads to localized pain in the muscle tissue. 2  Poor sleep, fatigue, and stiffness are common in myofascial pain syndrome. 3  Myofascial pain syndrome is simply diagnosed based on the areas of complaints of muscle pain and associated tenderness upon examination. Myofascial pain syndrome facts. 1  Muscle pain, tenderness, and spasm are characteristics of myofascial pain syndrome. 2  Myofascial pain syndrome typically affects muscle in asymmetric areas of the body. 3  The precise cause of myofascial pain syndrome is not known. 1 Myofascial pain syndrome leads to localized pain in the muscle tissue. 2  Poor sleep, fatigue, and stiffness are common in myofascial pain syndrome. 3  Myofascial pain syndrome is simply diagnosed based on the areas of complaints of muscle pain and associated tenderness upon examination. The most common causes of muscle pain are tension, stress, overuse and minor injuries. This type of pain is usually localized, affecting just one or more muscles or parts of your body. Systemic muscle pain, which you feel throughout your body, is different. It's more often the result of an infection, an illness or a side effect of a medication. Common causes of muscle pain include: 1  Chronic exertional compartment syndrome. 2  Chronic fatigue syndrome. 3  Claudication. 4  Delayed-onset muscle soreness (DOMS). 5  Dermatomyositis. 6  Dystonia. 7  Fibromyalgia. 8  Hypothyroidism (underactive thyroid) Myofascial pain syndrome is characterized by muscle pain, tenderness, and spasm. Myofascial pain syndrome usually involves muscle in body areas that are asymmetric or focal, whereas fibromyalgia is typically a diffuse and symmetric muscle pain syndrome that involves both sides of the body. 1 Myofascial pain syndrome leads to localized pain in the muscle tissue. 2  Poor sleep, fatigue, and stiffness are common in myofascial pain syndrome. 3  Myofascial pain syndrome is simply diagnosed based on the areas of complaints of muscle pain and associated tenderness upon examination. Learn the symptoms, causes, and treatments of piriformis syndrome. The causes of back pain can be complex -- accidents, muscle strains, sports injuries. Stiffness, pain, lower back pain, and pain radiating down the leg are symptoms of back pain. Overexertion, pinched nerves -- all sorts of joint and muscle problems can cause neck and shoulder pain. Click here to read more about how shoulder and neck pain are diagnosed and treated. A car accident or any abrupt jerking motion to the head and neck -- and suddenly you have serious neck, shoulder, back pain. Muscle pain, also called myalgia, refers to pain or discomfort in any muscle of the body. Muscles include skeletal muscles that are attached to bones and contract to move your body. Although we often think of skeletal muscle pain, problems with other kinds of muscle, such as smooth muscle and cardiac muscle, can also cause pain. Smooth muscles are found in the walls of hollow organs in your body, such as your stomach, bladder, and blood vessels, and play a big role in normal organ function (December 2013). Myalgia, or muscle pain, is a symptom of many diseases and disorders. The most common causes are the overuse or over-stretching of a muscle or group of muscles. Myalgia without a traumatic history is often due to viral infections. Longer-term myalgias may be indicative of a metabolic myopathy, some nutritional deficiencies or chronic fatigue syndrome. 
http://www.medicinenet.com/muscle_pain/article.htm http://www.webmd.com/pain-management/guide/myofascial-pain-syndrome http://www.healthgrades.com/symptoms/muscle-pain http://www.medicinenet.com/muscle_pain/article.htm http://www.medicinenet.com/muscle_pain/article.htm http://www.mayoclinic.org/symptoms/muscle-pain/basics/causes/sym-20050866 http://www.medicinenet.com/muscle_pain/article.htm http://www.webmd.com/pain-management/guide/myofascial-pain-syndrome http://www.healthgrades.com/symptoms/muscle-pain https://en.wikipedia.org/wiki/Myalgia
what causes pain in muscle