1 Of these over 600 million were obese. 2  39% of adults aged 18 years and over were overweight in 2014, and 13% were obese. 3  Most of the world's population live in countries where overweight and obesity kills more people than underweight. 4  42 million children under the age of 5 were overweight or obese in 2013.
Most bruises take anywhere from two to four weeks to heal completely and disappear. Leg bruises tend to linger longer than bruises on the face and arms. Some herbal ointments, such as those containing Arnica, can speed up the healing process.
Why Bruises Form and How They Heal. Like we mentioned before, bruising appears when tiny blood vessel, or capillaries, break due to a blow to the skin. The appearance of a bruise changes over time, and you can tell how old a bruise is and where it is in the process of healing by observing its color.enerally, your skin should look normal again in about two to three weeks after an injury. 1  When a bruise is brand new, it will appear reddish due to the color of the blood that leaked from the capillaries under the skin. 2  At one to two days old, a bruise will take on a bluish or purple color.