Post-blood draw bruising of the arm in pregnant women is due to the lack of prolonged pressure to stop the local bleeding after the puncture needle is removed, a condition that does not require too much stress. If there is no significant local pain and swelling, it will disappear completely in about 2-3 weeks. If the local symptoms are more severe and cannot be relieved by self-treatment, hospital consultation is recommended, except for coagulation abnormalities. Due to sensitivity to medications during pregnancy, it is not recommended to apply topical medications or use internal medications to relieve symptoms. In order to avoid a similar situation afterwards, it is important to apply pressure for at least 10 minutes after blood collection.