My 85 Yr Old Mother Fell 10 Days Ago And

My 85 yr old mother fell 10 days ago and hit her head. She did not have a headache or anything after. She is normally forgetful and had dementia and anxiety - before so we could not tell any difference in her behaviour. However, just 4 days ago she began to have abnormally high sugars (she is diabetic) and now requires more insulin than usual. Just last night she had severe diarrhea. Just wondering if the high sugars or diarrhea could be from a possible concussion.