Hello dear, Thank you for your contact to health care magic. I read and understand your concern. I am Dr Arun Tank answering your concern. No, puberty hit never causes anybody ill. Puberty is transition of normal life. So it will not make you ill. Puberty arise because of the rise in the testosterone level. Once we achieve the hormone on enough quantitiy it will grow the hair on the body and other hormonal effect. But testosterone builds up muscle and causes the rise in BMR. So you feel increases in appetite. So if you do not eat properly. You feel tired and weak. So in my advice this is the period of yours to eat in high quantity. Do good daily exercise. This will not make you feel ill and you feel healthy. I will be happy to answer your further concern on bit.ly/DrArun. Thank you, Dr Arun Tank Infectious diseases specialist, HCM.