Such twitching is often benign fasiculations.
They can lasts for months, but usually do not.
Even though this is most likely benign, see your doctor to rule out other problems with examination and labs.
.Calcium imbalance and electrolyte problems.
We can not examine you and can not say for sure this is nothing.
Structural stress is another common cause, and physical exercise, relaxation and physical therapy can also help....another reason you need an exam.
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