No, probably not. And if it did, then the problem was not the activity of the training itself, but that it was done improperly. Hernias are known to be caused by lifting heavy objects using poor technique. They say you should bend your knees and not your back. The other important thing to do is breathe correctly. You should exhale of effort and inhale on the recovery.
If it isn't an inguinal hernia it could just be a growth. This does not mean it harmful, it could be a begin growth that will have no effect on your health.
Weight training.
No. I've had my belly button pierced for eight years and never had a hernia. So I have a hard time believing that a belly button ring could cause a hernia. It can cause an infection but it can't cause a hernia.
Hiatus
You could always try the yellow pages. You could go to any local gym, they have personal trainers or information on classes you could take.I am assuming you ment good training routine and not goof training routine
Having a personal training school help you lose weight could or could not help you lose weight faster. It really depends on your body and the person them self.
I recently had surgery in July to repair an umbilical hernia only to be rushed to the hospital in October to repair 3 additional hernia's (holes). They wouldn't let me leave the hospital without the procedure. I assumed this was serious.
Can be a hernia, have it checked out.
She could die.
A wonderful place to start would be with your local gym. Depending on the popularity of weight training in your area, perhaps you could find information in the event section of your local newspaper.
I am not so sure in UK but here is an estimate, if it is Hernia Repair Epigastric - it could cost at around $1500 - $3500 (http://www.surgerycosts.net/price.php?medical=hernia-repair-epigastric), and if it is Hernia Repair Inguinal it would cost you at around $1500 (http://www.surgerycosts.net/price.php?medical=hernia-repair-inguinal) Good Luck!
There are various places where you can learn about an incisional hernia including: learning from WebMD, this website also shows the causes and treatments of hernias.