Symptom: Sudden pain in a calf or thigh accompanied by swelling, redness or warmth. Possible problem: A blood clot in your leg (deep-vein thrombosis, or DVT), usually caused by dehydration, prolonged inactivity, pregnancy, birth-control pills, hormone therapy or certain types of cancer.
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A twizzle is also common in synchronized skating where it is also a required element of step sequences. A twizzle differs from a figure skating spin in that it travels across the ice instead of being centered in one spot. It also differs from a series of three turns in that the turning action is continuous.