When diabetes goes into remission can that be permanent or does it always come back later ?

It really depends on whether it is type 1 or 2. Type 1 diabetes does not go away-the pancreas no longer makes insulin and insulin is necessary for survival. Type 2 diabetes can be controlled with weight loss, diet, exercise, etc. It can return if the risk factors return-like if weight is gained again, etc. Hopefully, it is now under control without taking medicine. Best of luck to you!