Healing trauma can reduce or remove triggers meaning overthinking could become less too.  
Once you get into using this method whenever you need it, it is hoped that the things that kept you awake before will start to dissolve one by one.  
Dr Bradley Nelson believes that a trapped emotion is a ball of energy that will lodge anywhere in the body and disrupt the normal energy field of the body.

Somatic healing has long been used to untrap these emotions/balls of energy. 
Healing traumas can return parts of you back to your true peaceful nature. Making you also more grounded in your empathic nature.