Benign fasciculation syndrome

Clinic

• BFS is characterized by fasciculation (twitching) of voluntary muscles in the body.
• It can occur in any voluntary muscle group but is most common in the eyelids, arms, hands, fingers, legs, and feet.
• Tongue can also be affected.
• Twitching may be occasional to continuous.
• BFS must be distinguished from other conditions that include muscle twitches.

Signs and symptoms

• The main symptom is Focal / Widespread involuntary muscle activity. The benign twitches usually have a constant location.
• Generalized fatigue or weakness,
• Paraesthesia / Numbness
• Muscle cramping or spasms.
• Anxiety and somatic symptom disorders and symptoms are commonly reported.
• Muscle Stiffness / Weakness / Cramps are (In presence of severe cramp, the syndrome named as Cramps fasciculation syndrome).
• Cramp fasciculation syndrome is a variant of BFS which presents with muscle pain and exercise intolerance.

Causes

• The precise cause of BFS is unknown
• Health anxiety disorder may be a cause BFS
• It can be caused or worsened by intense and long periods of daily exercise
• Some drugs

Classification

BFS and the variant cramp fasciculation syndrome can be regarded as part of a larger spectrum of disease that also incorporates acquired auto-immune neuromyotonia.

Related disease

Motor neuron diseases (MND) such as ALS, neuropathy, and spinal cord diseases.

Miasms

WNE: It has also been known to cause BFS-like symptoms, such as tremor, muscle twitching, and perceived muscle weakness/fatigue. Patients can expect a full recovery, as reported on the subreddit BFS.