Bruises occur as a result of blood seepage under the skin and usually disappear within 2-4 weeks. The process of healing of bruises is marked by a gradual change in the color of the bruise, from the beginning of the wound being formed to total recovery. When small blood vessels under the skin are damaged or broken, blood will leak into the surrounding tissue and clot. This causes the skin to appear reddish, bluish, to purplish, accompanied by swelling and pain. This condition is known as a bruise. There are a number of factors that have the risk of causing blood vessels under the skin to be damaged or broken and cause bruising, including: Impact with hard objects. Accident. Strenuous exercise. Fell or sprained. Physical abuse. Vitamin C deficiency Old age, where blood vessels are usually fragile and prone to rupture. Taking certain medications, such as nonsteroidal anti-inflammatory drugs (NSAIDS), blood-thinning drugs, and cancer drugs. Certain medical conditions, such as...