> CBG goes up by 3
CBG ? Not familiar with this term and it isn't in
https://www.diabetes.co.uk/glossary/glossary.html
I presuming BG is blood glucose, but what does the C stand for? Also by 3 I assume you mean 3 mmol/l rather than 3 mg/dl (as used in America).
Unless you are adding sugar to your tea, that does seem to me to be quite a jump.
An increase certainly does happen to some people, but not to me. Tea or coffee (even with a little tiny bit of milk or cream) does not cause any noticeable spike. but a latte with 10 carbs would cause a jump or around 2. My blood sugar jumps around a lot, so what I drink depends on my blood sugar on the day.
Have you tried decaffeinated tea? (From what I have read, the jump may be caused by the caffeine).
Or maybe try herbal tea or if you are adding milk a different type of milk.
Do you have a CGM? (Continuous glucose monitor) Strangely CGM isn't in
https://www.diabetes.co.uk/glossary/glossary.html either.
If so. do you know if the increase is temporary or does it fall back down within a hour or so.
> Do I inject 1 unit Novorapid each time I drink tea?
Can't answer that question as I don't know know how much a unit will drop your blood sugar, or how many cups of tea you take. It would certainly not be a good idea to take novarapid every hour if you happen to take a cup of tea every hour as you should leave a couple or hours between novarapid injections.
I don't know if this is just me, but I always treat correction doses as a last resort.