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
(2023) 15:e37783
[29] [30] La primera estructura de baja resolucin de la glutatin reductasa fue resuelta en 1977
Proc Natl Acad Sci USA 93:26522657 Huang Z, Wang Q, Khan IA, Li Y, Wang J, Wang J, Liu X, Lin F, Lu J (2023) The methylcitrate cycle and its crosstalk with the glyoxylate cycle and tricarboxylic acid cycle in pathogenic fungi
Department of Health and Human Services Food and Drug Administration Center for Biologics Evaluation and Research