Hi welcome to healthcareMagic
By taking Insulin
injection, it will not have any side effect... since you are suffering from Type 1 Diabetets melletes , you are advised for Insulin injection.... only if you take excess in dose or failed to take food after injection , it will lead to HypoGlycemia
... other side effects are like Lipodystrophy
, which is local changes of fat tissue at the site of injection... Hope i have answered your question....