Hello, this is not caused by diabetes. This seems like a symptom of an allergic reaction. I could not tell what causes it, since I ve no information about her medical history. Important information include: - the drugs she s taking: what drugs, for how long, when did the symptoms start. - history of allergies. - changes in every day living like a new perfume, food etc close to the symptoms. These are the most important. More information could be extracted in a clinical encounter. Causes of allergy can be difficult to unravel. A visit to a specialist in allergies would help. The specialist could conduct clinical or laboratory tests to investigate the cause. I hope I ve addressed your concerns! If you have further questions, please ask and I ll be glad to answer. Kind Regards!