Can twitching throughout the body be caused by poor circulation?

Twitching: Generalized twitching is more apt to be muscle irritability caused by deficiency of magnesium,calcium,potassium,occasionally sodium rather than by faulty circulation. Have your physician examine you and if he/she deems it advisable,the appropriate tests will be ordered.

In addition:: to vitamin, electrolyte, calcium and magnesium deficiencies, generalized twitching can be a manifestation of stress, tension, anxiety, drug/alcohol use/abuse, exhaustion, lack of sleep/insomnia and or thyroid disease.

Poor circulation is : not really a meaningful term. It's a holdover from an earlier time when the lay public had seriously simplistic notions about the circulatory system. Anyhow, "poor circulation" causes things like heart attacks & gangrene, not generalized twitching. That's something else: Genetic, metabolic, neurological, drug side effects, etc. It has a broad differential diagnosis. DEFINITELY see your doctor.