Insomnia, vision changes and eye problems, headaches, shakes, chills, fevers, numbness, burning, tingling, electric shock feelings, neck pain, muscle and joint
pain, jerking and
twitching of limbs and
muscles, restless leg syndrome, spasms, cramps, fatigue, muscle weakness, balance problems, abnormal anxiety, depression, acid reflux, etc.
Any one person will not have every single symptom. Everyone's symptoms differ in severity, the number of symptoms and what body systems are affected.