Well, I'm not a doctor but first off, it wouldn't be surprising if he's depressed. But you also have to consider he has a chronic illness, too. I work with diabetes patients everyday. 99.9% of them have depression. I mean, being angry and depressed to have this physical condition that will never go away, that's rough. Cancer, diabetes, bipolar... we're all living with chronic illness. It's very natural to be angry at god.

Also, you need to consider how his BGs run because swinging from low to high causes mood swings just like with bipolar. I actually often see a lot of similarities between bipolar and diabetes. Strange, right? Not really. They are both chemical issues in the body. Especially when BGs are running high can cause sudden anger outbursts over little things. I grew up with that, my dad was always in the low 200s. (He's type 2 but the effects are the same.) And I see it all the time. We see people who have BGs running int he 500s and those people are seething with rage, snap like a twig at the smallest annoyance. As they get better, they start to feel happier, too. The thing with BGs being off (low and high) is your body gets used to it and you don't even realize that you feel bad anymore.

As for other symptoms... "Spending" is part of "risk taking behavior" and "poor judgement." Not everyone is a spender. Risk taking behavior during mania can be spending, gambling, sexual promiscuity, suddenly quitting your job for no logical reason / job hopping, and so on.

But the best thing is have him take the depression and mania quizes here, print out the results and take him to a psychiatrist. Also, does he have a certified diabetes educator? Having a good endocrinologist for the medical side, and certified diabetes educator is really good to help with the self-care side, even if he just goes in to keep in touch, stay up to date on carb counting and BG monitoring, and having someone to reach out to if things get out of whack. And then also a good resource is a psychologist who also speicializes in diabetes, even for depression if not bipolar. Then he would have a full wellness team.