When brain receives and retains stress from surrounding beyond its critical limit. Followed by chemical change at any particular area, brings the brain away from homeostasis/harmony/equilibrium, and causing the different systems of your body to function abnormally and creating psychosomatic disorders.
Psychosomatic disorder is an illness that connects the mind and body.
This occurs in such a way that the physiological functioning of the body is deadly affected by the psychological tensions that either cause a disease or worsen the pre-existing disease in a person.
It is also known as Psycho-physiologic disorder.
An improper stimulation of the autonomic nervous system, which regulates the functions of the internal organs, is responsible for the evolution of this disorder and leads to impairment of the functional organs.
Lost harmony/homeostasis alters the neuro-sensitivity of the concerned brain as a forward step towards self-regulation, which is the property of brain and alters the natural neurological mental software/programming of the brain and makes the brain more vulnerable to receive and retain stress from the surrounding, creating a chain reaction inside the brain.
It is very much clear that it is our mental programming, written neurologically inside every brain, which makes us to conceive and perceive from the surrounding in a different way
For healing and fixing up of any mental disorder in any form, it is required to correct the software of brain at neurological level, due to which concerned brain has lost its homeostasis/harmony in the internal atmosphere and causing it to think and act in such a way that it became more vulnerable.