Tics- a twitch, spasm, or or vocal spasm due to twitches in muscles.
Something is directly affecting the nervous system for that to happen.
From my medical research I do know that there is a condition in the body in which in can be in a constricted state. In this state, typically the hormone called cortisol (which helps someone deal with stress) is affected (too high). This causes CELLULAR potassium to be low. Potassium is a relaxer of muscle. In fact, those high hormones cause low potassium, low magnesium (also a relaxer) low calcium, low vit b, low zinc. .Vitamin b directly affects the nervous system as well. It is created in our gut, by gut bacteria which eats and excretes vit B. Those who have had antibiotics or have high stomach acid from high cortisol will have lowered vit b levels. I do liquid vit b12, and liquid b complex under the tounge, also Magnesium malate or citrate. Potatoes, bananas, and potassium supps. That should help relax the nervous system.
Also, these conditions can cause tics because these all affect the central nervous system or neurotransmitter functions:
*Steroids (manmade cortisol hormone)
*parasites
*carbon monoxide
*drugs-certainly stimulants and amphetamine type drugs... antipsychotic drugs....(for schitzophrenia, etc)
drugs that cause serotonin increases (ADD /aspergers drugs) which cause serotonin syndrome- a type of poisoning to the CNS which will cause tics.
*autism itself which can be directly related to adrenal hormone secretion malfunction
*Huntington's disease
*Wilson's disease (the high copper affects muscle ridgidity.)
*encephalitis
*bacterial infection from strep
*tourettes
* 'possibly' could caused also by blood sugar dysregulation which will affect the CNS. Low blood sugar can cause adrenaline surges. adrenaline gets the body ready for flight or fight- nerves are constricted, hands may shake, etc....