People with BFS experience a persistent twitch, tingling, or numbness in one or more of their muscles. BFS causes chronic muscle twitching, which can last for extended periods of time or come back regularly. Twitches may appear in random muscles and may get better or worse with time. BFS is rare, and the exact cause is still unknown. One theory is that BFS is a response to a viral infection. Fasciculations themselves can have a range of causes, including the use of certain substances or medications, especially allergy drugs.
These twitches will usually subside when the person stops taking the medication and do not cause BFS. Muscle twitches may also be due to trauma and injury or may be symptoms of anxiety or depression. They can sometimes be linked to other stress-related symptoms such as irritable bowel syndrome , heartburn , and headache. Some people who lack certain minerals, such as magnesium or calcium , may also develop muscle twitches.
Twitching in the calves and thighs occurs most often. However, it may happen almost anywhere in the body. Fasciculations may appear randomly or may stay in one muscle for an extended period. The twitch will be most noticeable when the body is at rest. After some time, a person may also experience pain in the affected muscle. The muscle may not respond well to exercise, and many people report feeling weakness as well.
According to an article in the journal Neurology , more than 70 percent of healthy people experience benign fasciculations, which are rarely associated with a serious neuromuscular disorder. These people may also experience numbness and cramps in the affected muscles.
Symptoms of BFS also appear to be a cause of stress and anxiety for people who have the condition. It is unclear if this stress and anxiety make symptoms worse, though many people report that it does. If stress does exacerbate the symptoms, then some people could find themselves in a cycle of BFS symptoms and anxiety.
Researchers noted that more studies were required to identify what effect treating BFS patients for their anxiety has on their physical symptoms. The College of Medicine , the largest of six colleges at the University of Florida Academic Health Center, opened in with a mission to increase Florida's supply of highly qualified physicians, provide advanced health-care services to Florida residents and foster discovery in health research.
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Find a walk-up location or schedule an appointment today. Read more. Muscle twitches are caused by our muscles tightening up "contracting" involuntarily — in other words, when we're not actually controlling them. Muscle twitches can happen for lots of reasons, like stress , too much caffeine , a poor diet, exercise, or as a side effect of some medicines.
Lots of people get twitches in the eyelid, thumb, or calf muscles. In these rare cases, eyelid spasms may be an early warning sign of a chronic movement disorder , especially if the spasms are accompanied by other facial twitches or uncontrollable movements. Learn more about vaccine availability.
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