Question from Dallas, Texas, USA:

My daughter is going through puberty. Every month when she has her menstrual cycle, we increase her Lantus dose a few days before as her dinner and nighttime glucose numbers increase. We decrease it after her cycle. We also see some lows on the morning hours at the start of her menstrual cycle. However, we are now seeing something we haven’t seen before and I don’t know if it is hormonal or not. For example, her blood sugar two hours after lunch was 140 mg/dl [7.8 mmol/L] and usually she will decrease slightly until dinner time but her glucose doesn’t increase greatly. The last several days, she has had an okay blood sugar two hours after lunch and then, at dinner time, she is in the middle to high 200s mg/dl [13.9 to 16.4 mmol/L] and then needs to bounce on the trampoline to get the number down before eating. Why would her glucose rise like this when it was okay several hours before? She is not sneaking food, if you were wondering.