In the past 2 weeks DD have had quite a BIG fluctuation in basal needs and I want to post here to hear about whether others have had similar experience. We are used to her basals going up for a week, then down for a week, and so on. Also, used to having to turn up basals 20-30% on weekends. However, when DD started Spring Break 2 weeks ago, we experienced a HUGE increase in her basal needs. We kept increasing the increments until they were about 50-75% more than usual and finally tamed the super highs. Just of note, the huge increase surprised us as even though we were on holidays, we did tons of walking and had lots of activity everyday, so we thought that her basals would stay the same as during school days. When it kept needing to be increased, we thought, oh well... must be hormones/growth. Anyway, we have been home from vacationing almost a week and as of today - downward spiral on the basals - lows after lows after lows. I just decreased everything almost back down 50% (this after two nights of 20% temp decreases and still lows). One thing that we noticed that stood out for explanation was that she's had playdates the last couple of days, whereas when on vacation, even though we were active, she did not have a friend to interact with. She is back to school tomorrow for the first day post Spring Break and out of fear of lows, I have turned down pretty much all basal setting back to what it was before Spring Break. Anyone here gone through drastic fluctuations of basal like these? Like I mentioned, we have always done 20% or so in either direction, but 50-75%??? Especially since we were somewhat active during these No-School days. Do interaction with friends contribute this much? Other variables that we thought of was different bottle of insulin (but that was ruled out). Altitude between home and vacation location (ruled out as we have been home almost a week and she needed the increase for 4 days after return). It's like insulin was just water while we were on vacation and for about 4 days after returning, and now just starting to work like insulin again. Thanks in advance. Thought we got the hang of this after almost 2 years but D is still throwing in surprises.