Pain in the arm after a blood draw is common in three situations, as follows: First, the normal physiological phenomenon, the pain of the needle inserted into the blood vessels are normal, the blood draw should be gently pressed with a cotton swab or cotton, at least five minutes or so, to ensure that the hemostasis. Second, venipuncture caused by damage to the vessel wall, will also cause local pain, the problem is not big, you can use eggs, hot towels for hot compress treatment, can accelerate the flow of blood, reduce pain, about three days will be able to recover, if the pain is intolerable can take painkillers. If the puncture site is red and swollen, go to the hospital in time to reduce inflammation, and keep the puncture site dry, clean and sterile to avoid wound infection, and pay attention to a light diet, drink more water and do not get cold, which will help the recovery of the puncture needle hole healing.