My first nurse teacher in high school told us about diabetic patients who act strange when their blood sugar is too high or too low. With no experience I could not be sure what she meant.
I was also taught about the ones whose blood sugar is too low who get belligerent.
I remember a patient who was very pale and was screaming and cursing so it was scary. I gave him a glass of juice which he quietly started drinking. He quieted down.
I have observed what looked like psychotic and childish behavior in people that I knew were diabetics and when their medications and patient care were not my business.
I have never known what to do. I did not know if it really was their diabetes or if they had some other thing wrong with them. I also never knew how to intervene unless they down on the floor.
I also know someone whose sugar runs high all the time and he shows no visible signs of it. He said his body is used to it.