The present findings will further the current understanding of the relationship between the mind and body from the perspective of East Asian medicine. Western medicine characterizes emotional disorders using “neural” language while East Asian medicine uses “somatic” language.
Citation from: Article Understanding Mind-Body Interaction from the Perspective of ...
Unbalanced or prolonged emotional stress can stress our internal organs and cause harm. Therefore, gaining some control of our emotional state is a major key to protecting our health.
In every biological being the sensation/perception of the surrounding (context) determinates reactions of the whole organism. E-Motion is Energy in motion and leads to reactions in the body ant its organs.
For example: If a shep looses his lamb, the milk ducts reacts. Under a microscope we may find a so called "ductal mamma carcinoma". This reactions forms back if the shep is pregnant again.
If you treat mouses with cigarette-smoke the lung reacts with metarmophosis according to the fear of death, the air sacs proliferate as a ancient evolutional reaction of the fear of death. Like a cancer-patient who got the idea that he/she will die soon... If you treat hamsters in the same way nothing will happen, because hamsters have no fear of getting burned according to the hamsters lifestyle in contrast to the lifestyle of mouses. A mouse needs a high sensibility for smoke, a hamster not.
Humans have the brain and its main-funktion the prediction. This ability of the brain - to scan the context and create predictions - is in humans on a high level. Old patterns of our socialisation are mixed in our daily prediction-process and if context meets imprint we call that "Emotion". Our interpretation leads to reactions of the body.
If a woman is in huge worry about her child for serveral months it is very probable the she becoms a ductal mamma carcinoma. This carcinome build back if the worry is solved in reality (the child is cured, alive not harmed any more...).
If a man looses his son and heir (in his interpretation of the death of his son) it will be very probalble that this man becomes cancer of his testicle.
Those mechanisms are very good investigated but rarely told according to the conclusion that these relationships between feeling of the context and its inner (unaware) interpretation in our prediction engine (brain) leading to biological reactions is not lucrative!
Louise Hay has a book that, when you have an injury to a part of your body, you look up the thought pattern associated with it. i.e. constipation "What are you holding on to and not letting go of?" or upper back/shoulder pain "What burdeons are you carrying that don't belong to you?" She gives positive affirmations to use for each condition. Your post sounds a lot like this and how illness may manifest from thought patterns. I don't know of any scientific studies to prove this for various conditions.