The great white shark is very well known for its size, with the  largest individuals known to have approached or exceeded 6 metres  (20 ft) in length and 2,268 kilograms (5,000 lb) in weight. It  reaches maturity at around 15 years of age and can have a life span  of over 30 years.
Benign fasciculation syndrome is characterized by occasional or nearly continuous twitching of various skeletal (voluntary) muscles in the body. This type of muscle twitching can also be seen in association with serious disorders like spinal injury, multiple sclerosis (MS) or amyotrophic lateral sclerosis (ALS).
Cheek twitching.: Cheek twitching may rarely be due to fasciculation yet far more likely be caused by hemifacial spasm. Fasciculation is a sign of ALS yet very unlikely to be found on the cheek. Your risk of ALS without other symptoms is extremely low especially at your young age. Benign fasciculations ...Read more.