Being a T2 myself, I see both a Dermatologist & Endocrinologist regularly. Between them they have to decide whether these eruptions (blisters?) are Actinic Keratosis (AK) or the result of an acidic pH. See "The pH Miracle for Diabetes" by Robert O. Young & Shelly Redford Young.
While diabetic Edema isn't rare, I never had it until this year, 5yrs after my original diagnosis. I quote:
"Symptoms for diabetes include excessive thirst, frequent urination, weight loss, blurred vision, increased hunger, frequent skin, bladder or gum infections; irritability, tingling or numbness in the hands or feet, slow to heal wounds, extreme unexplained fatigue. If you experience this combination of symptoms, it diabetes screening would be in order."
Skin infections c/b blisters, eruptions or even AK like! AK has other things to worry about, they often are pre-cancerous & lead to squamous cell carcinomas.
I'd certainly have a Endocrinologist involved, some Dermos aren't fully trained MD's, or is that not the case in the U.K.?
GLA!