[hope is never lost]

I have my family member who is 13 years old and he is overweight and he was told by the doctor that he was getting close to getting diabetes. He needs to watch for his diet and. One of the things I don't know is what are the symptoms of diabetes and. He gets alot of nose bleeds and a couple days ago he's been telling me that his arm and hand gets numbed, this happens everytime he usually wakes up in the morning. I am really worried about him I don't want him to get worse. what can I do to help him, and why does he keep getting nosebleeds for like 10 minutes.? thank you