Always good to have a reason I have also had this happen when my folate was low , it may be worth you getting it checked I had self inject my B12 every 4 weeks for the last 20+ (cannot really remember how long accurately), and 2 months ago got a similar 'electric shock tingling' all over my body - head, face, arms, hands, legs, feet etc within a couple of minutes of injecting, which lasted about 3 seconds or so
A physician reviews your complete health history, sleep patterns, and contributing lifestyle factors
The conditions that may also contribute to glycine depletion include obesity, hypothyroidism, diabetes, and depression
Its important to care for your temporary crown properly, avoiding hard or sticky foods and using dental floss carefully