The term which applies to this type of scenario is Placebo effect.
Explanation:
In Placebo effect an individual reports an improved health condition without undergoing an actual treatment. Mind plays a pivotal role in placebo effect and deeply influences our body too. Our mind has the ability to trick our body into believing that a fake treatment can heal our heal.
Placebos, which are pills having no therapeutic benefit, can powerfully influence our body to mimic the action of a real medical treatment.
