Bruising on the hand during infusion is due to the formation of subcutaneous hematoma caused by bleeding from blood vessels during or after infusion, and bruising occurs. If this condition occurs within 24 hours, cold compresses can be applied to reduce the bleeding. Over 24 hours, hot compresses can be used to promote the absorption of local inflammation, or drugs such as Xylitol can be applied locally, which can reduce pain and also promote the dissipation of local inflammation. If you want to prevent similar situation in the future, you can reduce the activity during the infusion or press the local puncture hole for a long time after the infusion, at least for 10 minutes or more.