Causes of toe twitching are: 1  Tensing up the toes (anxiety, habit) 2  Improper footwear, especially a tight toe box. 3  Exercise. Pressure on a nerve (shoes, foot position while seated or lying down)  Anxiety (not necessarily about whatâs causing your toes to twitch, but anything that can cause 1  apprehension) Insufficient calcium and magnesium intake.
Alcohol is a central nervous system depressant and it is the central nervous system which is the bodily system that is most severely affected by alcohol (see chart below). The degree to which the central nervous system function is impaired is directly proportional to the concentration of alcohol in the blood2.
But how alcohol effects blood vessels is much more complex but it seems it's due to it's effects on the functioning of the nervous system. I'll have to quote rather than try and explain because i can't say i totally understand extactly how this all works: Alcohol is a central nervous system depressant.