Can one's blood sugar rise following a totally carb free meal (i.e. protein and fat only--bacon and eggs)? Mine went up a little after bacon & eggs.

Absolutely! How? New. glucose from (a) release of glycogen &/or (b) conversion protein & fat in liver (gluconeogenesis); part of being in ketosis; induced by glucagon output from the alpha cells of the pancreas (under brain control). This is how we prevent low glucose concentrations when fasting. However, when people become diabetic, they ?ingly secrete glucose even while/after eating a meal, thus further ?ing glucose.