Purple bruising after blood draw
Apr 07, 2023
Source: Cainiu Health
Dr. Zhang Heyang
Introduction
Purple bruising after blood draw is usually caused by physiological or pathological factors, such as abnormal coagulation function or hepatitis. Treatment may include general care or medication depending on the symptoms. In addition, purple bruising following blood draw may be related to improper technique or capillary rupture.
Purple bruising after blood draw is usually caused by physiological or pathological factors, such as abnormal coagulation function or hepatitis. Treatment may include general care or medication depending on the symptoms. The details are as follows:
1. Physiological Factors
When a large-gauge needle is used during blood collection, a relatively larger puncture site remains after needle withdrawal. If the site is not pressed promptly or insufficient pressure is applied, blood may leak into surrounding tissues, resulting in localized purple bruising. This condition typically does not require treatment and will gradually resolve over time.
2. Pathological Factors
1) Abnormal Coagulation Function
If the body's coagulation function is impaired, platelets cannot clot properly after needle removal, leading to subcutaneous bruising at the site. Under medical guidance, medications such as ferrous sulfate tablets or dexamethasone tablets may be prescribed for treatment.
2) Hepatitis
Purple bruising following blood draw may be related to hepatitis. Hepatitis can impair the liver's ability to produce coagulation factors, thereby causing bleeding or bruising at the puncture site. Under medical supervision, medications such as hepato-protective tablets or bicyclol tablets may be used for treatment.
In addition, purple bruising after blood draw may also be associated with immune thrombocytopenic purpura.
