Hugs can instantly boost oxytocin levels, which is a natural antidepressant, can help heal feelings of loneliness, isolation and anger. Holding a hug for an extended time lifts one's serotonin levels, elevating mood and happiness. 

The Power of Hugs and How They Affect Our Daily Health 
https://www.sclhealth.org/blog/2019/07/the-power-of-hugs-and-how-they-affect-our-daily-health/?fbclid=IwAR1eZS2kzGSpcSQz07eQ3BTJ641lTH6-lcgcgcP8OiF4RMZ4VVPI-mYchug