Diabetes can alter the body’s immune system and reaction to both allergy symptoms and allergy medications.

Allergies don’t affect blood sugar directly, but some medications may.


Diabetes and Itching – Causes and Treatment Options
By Ginger Vieira On May 9, 2020

Treatments to relieve allergy symptoms may impact blood glucose.
Pamela DanielsMichigan State University Extension – 

Allergy Tips for People With Diabetes. 
By Christina Boufis. Medically Reviewed by Brunilda Nazario, MD on January 15, 2014. https://www.webmd.com/diabetes/features/diabetes-spring-allergies