You have no doubt heard of the Placebo Effect, used in medical trials where a group of patients is given the trial medicine, and a control group given a sugar pill. Yet the group that takes the sugar pill often show similar effects as the group given the medicine. Doctors attribute this effect as the power of the brain and thought on the healing. The patients believe the medicine will make them feel better, and the belief alone is enough for the healing to manifest.
If the brain can have such an impact on healing, then the other side would be true as well, the brain can make us sick just through negative thoughts. Watch these videos below to learn more and whether you believe in the placebo effect or not, the real lesson here is to maintain positive healthy thoughts.
Introduction to Placebo Effect
Introduction to No-cebo Effect