Benign Fasciculation Syndrome Symptoms And Causes

Benign Fasciculation Syndrome is complicated. A patient with BFS often has increased anxiety and fixates on the possibility of serious neurological disorders. This tendency is probably due to ascertainment bias since anxiety usually brings patients to their physicians. However, twitching can be a sign of benign conditions and cause anxiety, and BFS is a relatively common ailment that nearly everyone will experience at some point in their lives. So, before you start seeking medical attention, learn as much as you can about the symptoms and causes of BFS.

Benign Fasciculation Syndrome Symptoms

Most people experience episodes of twitching from time to time. However, when switching occurs on multiple body parts, you should seek medical attention. Your neurologist can help identify benign fasciculation syndrome by evaluating your reflexes and strength. Other tests used to diagnose the disorder include blood tests and biopsies. Electromyography (EMG) is a test that measures nerve damage. A normal EMG is an indicator of benign fasciculation syndrome.

Muscle twitching and numbness are the primary symptoms of BFS. They are often more pronounced at night and during stress, exertion, or infection. While BFS symptoms typically disappear in a couple of months, they may persist for months or years. People with BFS also experience periods of muscle cramping and numbness. Some individuals even experience tingling sensations.

Benign Fasciculation Syndrome


While BFS is usually a completely harmless condition, it can still harm a person’s life. It can cause muscle cramps to occur regularly or constantly. Muscle cramps are common in the arms, legs, and feet, but they can also affect the eyelids. People who suffer from this condition experience pain, fatigue, and cramping, but it is important to note that cramps are not the actual cause of BFS.

While there are no known causes of BFS, it is often associated with other underlying medical conditions. Because it can appear at any age, men and women of any sex can develop this condition. In some cases, associate the syndrome with a viral infection or an autoimmune disorder, such as Parkinson’s disease. Symptoms of BFS can be mild, but it’s important to talk to your doctor if they find that your condition is more severe.


The diagnosis of benign fasciculation syndrome requires a careful neurological examination and clinical examination of all affected areas. In some patients, muscle twitching is the main symptom. An unremarkable neurologic examination may provide some reassurance, as this condition is unlikely to be caused by an underlying neurologic disorder. It should perform a repeat examination within six months to determine if any clinical change has occurred.

In some cases, patients may experience muscle cramping ranging from occasional Charley horses to severe pain. The cramps can occur in a single area or in multiple locations. So, some people may also experience tingling. Abnormal muscle contractions are not considered dangerous or progressive despite their discomfort. Several factors can trigger them, including recent infections and other medical conditions. Moreover, the symptoms may start with caffeine, central nervous stimulants, or exercise.

Evidence Of Benign Nature

Clinical weakness is a vital part of the diagnostic process for determining whether a person has benign fasciculation syndrome. Determines through a series of strength tests, including lifting and lowering one or both legs. Tests may also include pushing with the toes and fingers or spreading the fingers apart. Another resistance strength test may involve going with the arms and hands and comparing opposing limbs.

The exact cause of BFS is unknown, but it may cause motor neuron disease, muscle diseases, or neuromuscular junction dysfunction. There is a strong link between BFS and anxiety, which may explain the symptoms. Anti-anxiety medication and stress-reduction training may be helpful, but people should avoid caffeine and stimulants during an episode. Some people may also have ALS, which causes breathing problems and may irritate the diaphragm.


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