The time to fade depends on the location, size and severity of the bruise, and most bruises fade in 1-2 weeks. Bruises are caused by external impact on the body, such as bumping, bumping, falling, etc., resulting in capillary rupture. The more blood supply, the faster the blood circulation, the easier the bruise will fade. For example, bruises on the head or face usually fade in about 1 week, while bruises on the limbs or body take longer to fade and may take about 2 weeks. In addition, the size of the bruise and the degree of the bruise will affect the fading time. If the bruise is relatively small and the area is also small, it can fade in about 7 days; if the area is larger or heavier, it may take about 2 weeks or even longer. Therefore, after bruising, patients should apply cold compresses to reduce the area of bruising, and after 48 hours, hot compresses should be applied to accelerate blood circulation and facilitate the fading of bruising.