Whiplash and similar neck injuries affect the sympathetic nerves, parasympathetic nerves and the brainstem, all contributing to an imbalanced autonomic nerve system with poor organ control. Patients may be hit by hyperventilation, cardiac syndrome X, abnormal stomach acid production and gut imbalances (inflamed intestine, leaky gut, yeast infections). 

Whiplash injury leaves patients in a chronic stress condition, from hypothalamic-pituitary-adrenal (HPA) axis dysfunction.  Thyroid glandular injuries are commonly causing hormonal problems. Some of the above listed associated disorders Symptoms likely stronger if patient had a mental trauma. 

Chronic whiplash injury causes central sensitization, a serious pain syndrome with origin in the central nerve system.  Only a few top clinics (incl. Mayo Clinic, Florida) are aware of the multiple physical co-illnesses associated with central sensitization, and declare it a broad physical syndrome (Read More). Diseases of the musculoskeletal system and connective tissue are common with pain after whiplash injury, that is a likely cause of fibromyalgia.

Of whiplash injured, 15% suffers from depression. Chronically ill patients with neck injury often suffers from post concussive symptoms. Read more… 

Science points towards mTBI being accumulative: Data from a large Danish study (100,000 patients) reports of close to two fold increased risk of a range of disorders (muscular & binding tissue, pain, low resilience against  infectious disorders/poison reactions etc.) after whiplash injury, when compared with non-injured. It likely develops gradually, as it is harder to identify differences before and after eachneck injury (ref).