careful, man. lots of things come into this. tingly fingers might be just the trigger fingers, but I hope the larger probability is that expressions like this are often very satisfactory ways to blow steam off.
clearly, he hopes it's just nerves. I notice he didn't respond at all on the diabetes front. knowing someone who has gone through all that to the bitter end is understandable justification for hoping it's something else, which Dal might be correct in figuring usually it is, and focusing on the nerves.
Still medical science has progressed on the diabetic front, and sometimes pre-diabetes or even diabetes can be for many years "reversed". The sooner one addresses it, the better it can be handled.
I have a brother with diabetes, my all-time best friend died from it after losing some pieces and his eyesight, I could list some others I know of. I suspected I might have it and switched some diet stuff and went to the doctor to get checked for it. For me, tingly fingers means maybe I need to change my immediate obsession and do something else because I'm sleeping the wrong way or something. Well, besides back pain, pinched nerves, MS, and clenching my fist too tight when knocking some sense into some hoodies. ha ha. like that ever happens.