Hello, and welcome! I have seen that same kind of message from many parents of diabetic children. Your son is still growing, and blood sugar is frequently unstable during growth spurts. Does your son take his diabetes seriously? Many teen agers do not watch what they eat so well, they skip shots, do not count carbs carefully, eat too much junk food, etc. These things will certainly cause high blood sugar. Taking too much insulin before meals can also cause bad hypos, is he having any hypos? What is his most recent A1c?
I'm sure he would not want to hear the message I have posted here. Maybe he is not guilty of these things, but most teens are, and that is just normal behavior for that age. He should take his diabetes more seriously, nut doing the best you can to advise him is all that can be expected of you in the meantime.
I have been type 1 for 65 years and I am very healthy. I use very tight control, and that has worked very well for me.
Ask all the questions you want, we want to help!
Richard