Spikes tend to happen if she’s ate a lot of sugar and or is stressing out. If it’s been stuck there for a while I’d then recommend the ER.
I’d suggest some exercise and water. Watch if her blood sugar drops then.
Make sure she washes her hands every time she tests too, makes a big difference.
But personally I have had blood sugar spikes like that and I hated everyone telling me to rush to the ER because it would cost me over a grand for the doc just to tell me “Oh drink some water, calm down and lay off sugar for a couple days”. I had a high blood sugar spike from a stressful birthday. So yeah a lot of sugar involved and a lot of stress.
But that’s just me, if you are too worried about it then visit the ER. I’d think if it sticks and doesn’t go down in a couple days then yeah, if she’s already on insulin then yeah ER is recommended.
I wouldn’t panic. my family comes from a LONG line of diabetes. My uncles blood sugar was 700 one time. No freaking joke.
He went to the doctor a few days later and the doctor told him his blood sugar was just fine. The doctor read like 120 from his test. So its possible if you maintain yourself you can lower your blood sugar and be just fine.