Hi @29821,

Functional neurological disorder (FND) is listed on the National Organization for Rare disorders as a medical condition in which there is a problem with the functioning of the nervous system and how the brain and body sends and/or receives signals. FND is a common cause of disability and distress, due to chronic pain and fatigue, limb weakness, seizures.

Often, FND co-exists with other illnesses – it can have similar symptoms to most types of condition seen in neurology such as multiple sclerosis, stroke and epilepsy. Some patients have both a neurological disease diagnosis such as stroke and FND. A neurologist will usually conduct tests such as
-MRI brain scans, X-rays, functional brain scans (fMRI) to identify whether symptoms are related to brain injuries or abnormalities.
-EEG (electroencephalogram) scans which can track brain waves, allowing doctors to detect problems associated with the brain's electrical activity, such as epilepsy.
https://rarediseases.org/rare-diseases/fnd/

As with any chronic illness, it is important that patients diagnosed with FND fully understand their diagnosis. Also, due to the size and complexity of this condition, the number of specialist nurses and allied health professionals dedicated to this condition has grown significantly.
Hope this helps.