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Multiple Chemical Sensitivity



Multiple Chemical Sensitivity has also been termed :

  • Toxic Injury (TI)
  • Chemical Sensitivity (CS)
  • Chemical Injury Syndrome (CI)
  • 20th Century Syndrome
  • Environmental Illness (EI)
  • Sick Building Syndrome
  • Idiopathic Environmental Intolerance (IEI)
  • Toxicant-induced Loss of Tolerance (TILT)

and is often involved in Gulf War Syndrome.



MCS and chemicalsThe most common primary characteristic of Multiple Chemical Sensitivity is an abnormal and heightened ability to detect chemicals in the environment especially through sense of smell and taste.

Detection is accompanied by a host of physical reactions, an immediate noxious stimulus response and severe aversion to chemicals.

Within the Dynamic Neural Retraining System™ we understand the need for regulating the chemical industry and the hidden dangers in many household cleaners, personal hygiene products, new textiles and pesticides.
We also understand that the initial neurological trauma and the ensuing trauma cycle involved in Multiple Chemical Sensitivity can alter the structure and function of the brain.


The condition of Multiple Chemical Sensitivity indicates that the brain is stuck in a distorted self-protective mechanism.

This cross wired neuronal circuitry directly affects the physiology of the body and manifests in a range of neurological, immunological and endocrine system abnormalities.

In response to a chronic trauma cycle the body's abilities to rest, digest or regenerate are affected.

This interrupts the normal growth cycle and detoxification process catapulting the brain and body into a cycle of chronic illness.

This destructive cycle leads to Limbic System " priming", which means less and less stimuli are needed to produce the same reaction. This can also lead to "Limbic Kindling", which is the brain’s inability to discriminate between stimuli and the sensitivity can spread from one stimulus to another.

Multiple Chemical SensitivitySome typical symptoms can include; acute sense of smell, difficulty breathing, cognitive impairment, brain fog, extreme fatigue, sore throat, loss of voice, muscle and joint pain, pain in chest or abdominal region, asthma, excessive mucus production, skin irritation, contact dermatitis, and hives or other forms of skin rash, headaches, racing heart rate, body flushing, neurological symptoms (nerve pain, pins and needles feelings, weakness, trembling, restless leg syndrome, etc.), tendonitis, seizures, visual disturbances (blurring, halo effect, inability to focus), extreme anxiety, panic and/or anger, unexplainable mood swings, sleep disturbance, suppression of immune system, digestive difficulties, nausea, indigestion/heartburn, vomiting, diarrhea, vertigo/dizziness, sensitivity to natural plant fragrance or natural pine terpenes, dry mouth, dry eyes, overactive bladder and food sensitivities.

Once Limbic System function is corrected, the destructive cycle is discontinued and sense of smell and taste begin to return to normal. Noxious stimulus response and physical aversion to chemicals subside and the central nervous system inflammatory cycle is interrupted. The hyper vigilance in the systems of the body relaxes which allows the natural growth and healing processes to resume.

MCS is often accompanied by protective or isolating behaviours, Anxiety and Depression.

Learn how DNRS can help you.








