"Researchers discovered that when a person is touched, the amount of hemoglobin in their blood increases significantly," said Helen Colton, author of The Joy of Touching.
Hemoglobin is a part of the blood that carries vital supplies of oxygen to all organs of the body— including the heart and the brain. An increase in hemoglobin tones up the whole body, helps prevent diseases, and speeds recovery from illness.
Regular hugging can actually prolong life by curing harmful depression and stimulate a stronger will to live.
http://meanttobehappy.com/the-happiness-of-of-touchiness/
