This is Dr. David
these small jerks and twitching can be from benign fasciculations in your foot which can come from stressed or strained nerves or muscles in your lower leg or foot.
not drinking enough water, not getting enough potassium in your diet can be part of the reason. most people don't get in 4600mg of potassium into their diet daily
also you may benefit from stretching exercises and yoga to stretch tight nerves and muscles in your legs which can help improve range of motion and flexability which could help your nerves and muscles not cramp up so badly.
if you have bad anxiety symptoms, this can worsen fasciculations
regular exercise and stretching and yoga and physical therapy can also help decrease some anxiety symptoms as well
let me know if you have other questions.
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