4.1　A small part the needle shaft should be exposed outside the scalp during the needle retention.Do not disturb the needles under the skin to avoid bending or breaking.If the patient feels discomfort in needling site，withdraw the needle 0.1～0.2cm.Special attentions should be paid to patients with severe cardio-cere-brovascular diseases during the period of needle retention.

4.2　Be cautious when treating the patients who are nervous，hungry，or overeat.Strong manipulation is not advised.

4.3　Carefully check the number of the needles after the needle withdrawal in order to ensure no needles are left. 4CinUU0wJHW+9lqsjiJn0GkqVLCzqEvAEuHH5ALeSxcv7KWFCAU3ckejPBr1+MTo