Posture like crossing of knees or ankles, sitting with your legs folded or one foot under your buttocks may cause pins
and needles in
leg and feet. Standing up for work, imbalance of calcium, potassium, sodium, peripheral artery disease, damage to spinal cord, diabetes can all cause this paresthesia. Vitamin B1,B6, B12 deficiency, hypothyroidism need to be checked.Consult a physician who would evaluate these symptoms and ask for relevant investigations. Hope this helps. Take care.