The Australian Red Cross Blood Service explains that bruising occurs after donating blood due to bleeding under the skin. It particularly happens when bleeding continues after the needle is taken out of the arm until the small hole in the vein closes.Continue Reading
Bruising after blood donation also happens when the needle is inserted into the arm and damage to the other side of the vein occurs, says the Australian Red Cross Blood Service. This creates a tiny hole through which blood leaks. Bruising also occurs when one of the fragile blood vessels below the skin gets damaged, resulting in bleeding. Bruising usually does not become immediately apparent during the donation period.
Large bruises occasionally develop after donating blood, notes the Australian Red Cross Blood Service. Some bruises appear while at the donation site, while others appear one or two days later. Although they tend to look serious, these bruises are generally harmless and disappear over time. It takes up to two weeks for the bruise to go away completely. While donors cannot always prevent bruising, they can minimize the size of a bruise by applying pressure on the area of the skin where blood was taken until bleeding stops. It is also important to wear the bandage for four hours after donating blood.Learn more about Wounds & Bruises
Some blood disorders that cause easy or unexplained bruising include leukemia, factor X deficiency, idiopathic thrombocytopenic purpura, hemophilia and acquired platelet function disorder, according to Healthline. Unexplained or easy bruising is the result of small capillaries just under the skin breaking and blood leaking into the surrounding tissue, causing discoloration.Full Answer >
A blood blister on the tongue is called angina bullosa hemorrhagica, or ABH, and is the collection of blood under the skin of the tongue, according to Medscape. It is usually not associated with any other medical issues.Full Answer >
Broken blood vessels in the hand are typically a result of an injury that jars the blood vessels, causing bleeding into the skin, according to Healthline. Infections of the blood, an allergic reaction, autoimmune disorders and the normal process of aging may also cause broken blood vessels.Full Answer >
Ruptures or tears of the small blood vessels known as capillaries result in bruising, according to WebMD. These ruptures allow blood to escape the circulatory system and enter other tissue. Most of the time, normal bruising heals on its own and is not reason for concern. During the two to four weeks a bruise requires for healing, it undergoes several color changes.Full Answer >