Hi @Shaz51
Sorry to read about what your friends grandson is going through. I can guarantee you that no one would make hyperventilation happen. It's hellish not being able to breathe, as is the panic that accompanies it. I had some really bad ones in the past where I could not breathe. To me it's worse than depression to cope with.
Chronic anxiety is usually the major cause of panic attacks - where one feels helpless, alone and very afraid feeling unable to cope with life at that time. Panic attacks can have many triggers:- excessive stress, trauma/physical/sexual/psychological abuse, shock, bullying at school, home or work; loss (grief), or constant worry over something. Large amounts of caffeine or sugar that fastens the heart rate can cause them. Feeling very unsafe in the world unable to cope with life is a major cause. Frontal lobe brain damage can also cause terrible panic attacks.
Other common causes of anxiety/panic attacks/hyperventilation, particularly among the young is substance/drug abuse (can fasten the heart rate and if ongoing cause frontal lobe damage to the brain). Other causes can be Heart problems, hormonal and thyroid imbalances, MS, vitamin deficiency, Parkinson's disease and other physical disorders can cause panic attacks, but more unlikely with the young.
It would be really helpful for this boy if someone like his grandmother or a professional could talk to him and listen to what is troubling him to help him through it. This will ease his anxiety. Just having someone care enough to listen could save someone. This may prevent him developing a complex mental illness if his issues can be addressed early. So important.
I hope all involved will be okay. Your a good, genuine caring person @Shaz51 and I always have time for you 💕 Hope hubby is okay.