Your condition seems to be called as myokemia which is a small muscles twitching does not necessarily be life threatening.It is usually caused by stress
, excessive intake of caffeine etc or for unknown reasons. However if it does not subside in a 4 week time period please consult your physician. You need some destressing and relaxation. If it does not resolve then some nerve
compression could be thought of and you would require to be consulted by a neuoro physician.