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.
Bruises develop when small blood vessels under the skin tear or rupture, most often from a bump or fall. Blood leaks into tissues under the skin and causes the black-and-blue color.As bruises (contusions) heal, usually within 2 to 4 weeks, they often turn colors, including purplish black, reddish blue, or yellowish green. Sometimes the area of the bruise spreads down the body in the direction of gravity.lood leaks into tissues under the skin and causes the black-and-blue color. As bruises (contusions) heal, usually within 2 to 4 weeks, they often turn colors, including purplish black, reddish blue, or yellowish green. Sometimes the area of the bruise spreads down the body in the direction of gravity.