Generalized weakness due to muscle weakness can affect anyone from any age group. The most common underlying cause of generalized muscle weakness, however, is prolonged inactivity, including from a sedentary life or bedrest. Sudden drop of muscle function, particularly in the upper body, is typically due to nerve damage and requires immediate medical assessment. However, muscular weakness due to injury or disease is likely to have long-term consequences. The following are a few conditions that can lead to weakness of the muscles.
Fatigue: Fatigue is a symptom that often occurs with other conditions. If you are experiencing fatigue you should consult your doctor for further information. The symptoms of fatigue can include muscle weakness, headache, anxiety, shortness of breath, loss of appetite, nausea, and fatigue-related feelings. Although fatigue is generally considered one of the symptoms of several diseases, it can also be caused by psychological issues, such as depression or anxiety.
Chronic Fatigue Syndrome (CFS): CFS is not actually a disease, but a clinical syndrome. It is characterized by extreme exhaustion and pain in the muscles and joints of the body. Due to this unusual condition, a person suffering from CFS will have a severely reduced ability to function normally and will be unable to engage in typical activities. Muscle weakness is very common in people suffering from CFS. Muscle testing can help detect the possible causes of chronic fatigue syndrome.
Muscle Injury: Muscle weakness can occur as a result of a direct blow or impact to the muscles of the body. Muscle injuries can also be a result of indirect trauma, such as an accident or fall. In these cases, the symptoms will only present themselves after several weeks or months of recuperation from the injury. In most cases, a direct blow to the muscles of the body will result in temporary weakness, as the bones will try to heal themselves. If the blow does not result in a complete breakage of the bones, muscle weakness may occur.
Neuromuscular disorders: A neuromuscular disorder is any condition that affects the nerves, such as multiple sclerosis and muscular dystrophy. Because this condition affects the nerves, it is one of the rarer types of diseases that can cause weakness in the muscles. However, symptoms should be apparent. Signs of neuromuscular disorders include a decreased ability to move the arms or legs (especially when reaching overhead), decreased feelings of fatigue, and numbness in the extremities.
Muscle weakness may occur in different parts of the body, but in most cases the problem occurs in the muscles of the legs. Muscle weakness can affect many parts of the body and therefore is potentially very broad in definition. Muscle weakness may occur in the muscles of the legs, thighs, feet, toes, but more commonly it affects the lower limbs only. Symptoms of a neuromuscular disorder are fairly easy to recognize. They include decreased strength, loss of balance, an inability to move the limbs, lack of coordination, pain, and a general lack of movement. Muscle weakness may occur in people of all ages, but it is more common in older individuals.