Unfortunately type 1 diabetes is not reversible. It occurs due to an autoimmune condition or cause, meaning your own body produces antibodies which attack the pancreas which is the site of insulin production. Therefore the pancreas burns out and quits making insulin. Hence lifelong insulin is required. If blood sugars are well controlled using insulin and healthy diet /exercise, it is possible to lead a completely normal and healthy life and it minimises the risk of future complications of diabetes such as retinopathy, cardiac problems, nerve and kidney damage.

Type 1 diabetes is not reversible. To confirm type 1 diabetes can do some antibody testing and confirm. Need to consult for further details.