It is painful after blood draw, usually because subcutaneous bruising has occurred. In this case, if the pain is severe and unbearable, oral non-steroidal anti-inflammatory drugs such as ibuprofen or diclofenac sodium can be taken. Local physiotherapy or hot compresses can be applied to promote the dissipation of local inflammation, and drugs such as Xylitol, applied locally, can also be used to accelerate the absorption of inflammation. This condition is usually due to subcutaneous bruising and hematoma caused by bleeding from the vessels due to ineffective pressure on the punctured vessels after blood collection, which can cause local infiltration of inflammatory cells and lead to the release of inflammatory mediators and stimulation of nerves to trigger pain. To prevent this from happening again, prolonged compression (minimum 10 minutes) should be applied at the next blood collection to avoid rebleeding.