Diabetes concern in three year old. Pic included

[SmallDucks]

My three year old has been generally unwell on and off for most of his life and it's manifested in self in sickness.

GP and I have basically put it down to cyclic vomiting given that he is otherwise thriving developmentally and physically - and he still is.

About 2 months ago he started developing a real thirst and started needing a wee at night or wetting the bed.

Alarm bells clanged, so I did a blood glucose test on him which was fine, around 5.

Also in the last couple of months he's developed a white coating on is tongue (see pic) which has not improved and I believe for a bit worse, but perhaps I'm being paranoid? Please see pic.

Im not very familiar with diabetes, but I know the key signs and that children don't usually present to hospital until they are DKA.

Can blood glucose go up and down before DKA?

Could the normal reading be a red herring or can that continue to reassure me?

Thanks.

Thirst, weeing more, tiredness and weight loss are typical symptoms. First 2 are the most common. Test blood glucose levels after a meal to see if in normal range.
Yes most present to hospital in DKA which is NOT good and far too late, so picking up before this is better and knowing the symptoms is a first step.

Have you done another BG test? 5 is fine of course but it’s definitely worth keeping an eye.