Many people have experienced petechiae and hematomas after blood draws and IVs. Why is this? What the people call blood draws and drips are medical terms for intravenous blood sampling and intravenous infusions. Petechiae and hematomas are both signs of bleeding from the skin and subcutaneous area. Petechiae and hematomas cause localized bruising, pain, and often take several days to dissipate, adding additional pain and making it more difficult to continue the drip to find a blood vessel. Why does everyone who has used hand pressure after blood draws and drips have skin petechiae and subcutaneous bleeding in some people? The main reason is that the position and timing of the pressure is not properly controlled. Some people use cotton swabs to tightly press the needle eye on the skin, some people keep wiping with cotton swabs, and some people rush to put on the sleeves once the needle eye has no blood, which are all wrong practices. This can cause skin petechiae and subcutaneous hematomas. What can be done to avoid this? Petechiae and hematomas after blood draws and IVs are caused by the punctured vein not being accurately and adequately pressed to stop the bleeding, so the trick to avoiding petechiae and hematomas after blood draws and IVs is to press the punctured vein during the draw and IV, not just the punctured skin. After the nurse punctures the skin with a needle during a blood draw or IV, the needle travels a short distance under the skin before puncturing a superficial vein under the skin. Then there is a certain distance between the eye of the needle on the skin and the location of the punctured vein, and the size of the distance varies somewhat depending on the depth of the vein and the nurse’s technique. However, in general, the location of the punctured vein is above the eye of the needle, which is centripetal, and most of the time it is not more than 1 to 1.5 cm. After the needle is pulled out for blood draws and drips, the last finger of the thumb is used to press the skin eye and the 2 cm upwards to make sure that the vein is pressed to the punctured point. All you need next is a little patience and time. The initial compression stops the outflow of blood from the punctured vein. After that we need to give the body a little time to stop the bleeding and clotting mechanism. This requires contraction of the vascular endothelium and also requires platelet clumping and coagulation factors to get out. Usually 3-5 minutes of compression is enough to stop it completely. Individuals on anticoagulants such as aspirin and thrombocytopenic patients should extend the duration of compression appropriately because their organism will take longer to complete the clotting mechanism. In individual cases, there is nothing that can be done for patients with petechiae and hematomas after blood draws and drips. It is only after the nurse has punctured or pierced some hard-to-find vein causing a subcutaneous hematoma that the needle is removed, when compression can only serve to prevent further bleeding. Petechiae and hematomas that have already appeared can only be absorbed slowly by the body. If petechiae and hematomas appear after accidental blood draws and drips, what can be done is to apply some cold compresses on the first day of petechiae and hematomas to stimulate vasoconstriction to avoid further bleeding. On the second day, some hot compresses can be applied to promote the absorption of the bleeding.