side effects of hypoglycemia

My daughter was diagnosed with hypoglycemia recently.  She is 15 and very active in sports (just finished soccor and on the basketball for her local high school).  We have tried to stablize this through diet but it is not  working the way we would like.  She has what I call episodes when she exercises of being shakey (shaky), lathargic, and just basicly out of it.  my question i guess is this.  Could the hypoglycemia be a symptom of something else or is this something we are going to have to adjust to?

[Shredderkrang]

Hi Julie,
I myself am a 25year old who is fairly active in sports too. I have reactive hypoglycaemia & suffer those exact same episodes sometimes daily sometimes. The first thing to say would be that there are many things that can cause hypoglycaemia, ranging from Addisons Disease to hormonal problems & thyroid problems. These were all negative in my case, but the next step after diagnosis should be a dietician. You say you tried to stabilise it through diet but did not elaborate, so this may or may not be of use.

As for it being the syptom (symptom) of something else, if you searach on the english Google, there are some good medical journals published which list all the areas to look into.
I hope this is of help