A blood clot is a mass of blood cells and proteins that accumulate in a blood vessel to stop excessive bleeding. In most cases, blood clots are healthy. The body naturally dissolves them once the superficial layers of an injury have healed. However, in some cases, blood clots do not dissolve naturally or form when there is no injury. Cancer, smoking, surgery, pregnancy, heart conditions, hormonal therapy, and inherited blood clotting disorders can all cause unwanted clots. These growths can cause a wide range of symptoms.
A red streak and slight discoloration on the skin can indicate a blood clot and may be one of the first noticeable signs. Discoloration occurs because of the thick buildup of blood and inflammation beneath the skin's surface. Unlike a bruise, which should fade, color changes caused by a problematic blood clot is likely to increase in visibility.
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