The McMafia and Grantchester actor called the condition a ‘complete bitch’ as he called on his Instagram followers to show their support to help find a cure for the disease.
Alongside photos with his two insulin pens and his Dexcom sensor, which monitors blood glucose, he wrote: “Today is World Diabetes Day.
“It’s Diabetes Awareness Day. But also just to show some love and support to all diabetic warriors.
“At best, our condition is an ongoing problem. At worst, she is a complete female dog who can be life-threatening on a daily basis, if not cared for properly.
“These two insulin pens I’m holding and the @dexcom sensor on my butt keep me alive every day.”
Norton, 37, added: “You have no idea how valuable these little devices are to us T1s and how grateful I am to live in a country where we have free access to this type [of] medicine and technology.
“That said, a cure would be nice. So head over to @jdrf_uk to see how you can get involved. And then go find a diabetic and buy him a Diet Coke.
Up to 400,000 people in the UK are thought to have type 1 diabetes, which is a lifelong autoimmune disease.
It is caused by the immune system mistakenly attacking cells in the pancreas that produce the hormone insulin, which in turn causes blood sugar levels to rise, often leading to life-threatening complications.
Currently, type 1 diabetes is managed by administering insulin, which keeps blood sugar levels low and under control. But there are new treatments targeting the immune system that could prevent or delay the disease.