My arm was bruised after having my blood drawn

If your arm appears bruised after a blood test, this is a common physiological phenomenon. Don't worry too much, because blood flows out of the blood vessels when the blood is drawn. Some people have relatively white skin, so the bruises on their arms will be more obvious. In addition, if you don't pay attention to stopping the bleeding in time after the blood test and move your arms around at this time, it may cause such a disease. Let's take a brief look at this aspect below.

Bruise on arm after blood draw

Blood tests are necessary for diagnosing diseases and health checks. After blood is drawn, a small needle hole is left on the blood vessel. Blood will seep out from the needle hole, and the seeped blood will accumulate under the skin, forming a purple mark on the surface. Generally, after having your blood drawn in the hospital, the doctor in the laboratory will ask you to press the needle hole with a cotton ball, but sometimes the doctor does not explain clearly how to do it. The correct way to press is to press the alcohol cotton ball slightly above the needle hole on the skin! Because the blood drawing needle enters the blood vessel obliquely upward after piercing the skin, the needle hole in the blood vessel should be slightly above the needle hole on the skin.

This phenomenon is also a common clinical phenomenon. This is because the blood in the vein runs out of the blood vessel through the needle hole, and instead of flowing out of the skin, it runs under the skin.

The amount of bleeding determines the size of the bruise.

1. You may have pressed the needle hole for a short time. Under normal circumstances, you should press it for at least 4 minutes.

2. The pressing time may be enough, but the force is not enough.

3. It is also possible that the time and strength are sufficient, but the pressing position is wrong. Usually, the pressing should include the visible needle hole on the skin surface and the range of 1 cm upwards. Do not just press the visible needle hole on the skin surface. This is because when many nurses draw blood, the needle enters the skin first and then does not enter the blood vessel directly, but goes a short distance under the skin before entering the blood vessel. This causes a distance of less than 1 cm between the needle hole on the skin surface and the needle hole in the blood vessel in the body. Therefore, if you do not press on the needle hole of the blood vessel, the blood in the blood vessel will flow out of the blood vessel and not out of the skin, but will remain under the skin and appear cyanotic.

Because the blood has coagulated inside, the best way to remove bruises is to rub the bruised area with a cooked egg. The heat from the egg can help blood circulation and the bruise will disappear faster. After applying the egg, it is best to rub it with some medicinal wine. It is better to choose a mild medicinal wine without irritation. Follow the above method and it will heal soon.