Hi! My heart and prayers are with you! My husband was on dexamethazone 40mg for four days every other week for over a year. He had swelling and weight gain and the eating binges and yes, developed diabetes. He now takes a long acting insulin every day and pills.
Numbness could come from ther swelling that one gets steroids for sure. The two main reasons for his neuropathy (fancy name for numbness) is Thalidomide and the new diabetes. The numbness may go away after awhile if he goes off Thalidomide and then again it may not. The diabetes seems to be the tricky one. If the doctors have no answer for his nerve problems they say " well, diabetes is the major cause of neuropathy" . I and my husband feel comfortable with his use of Thalidomide. Even, I as a occasional patient with asthma did not realize the effects of long high dose steroids. I think the "dex" caused alot of his early side effects and now his diabetes.
If, I can help further, let me know. Knowledge is good. I am on the computer looking and reaching all the time.
Fondly,
Colleen