Hello,Thanks for your query.
After going through your query I came to know that your girl friend is probably suffering from
lumbar disc prolapse. Her mother was punched in the stomach while she was in the womb,has no relation with this pain.
It is confirmed by MRI scan and also exclude other causes of
backache.
There are two treatment options.
First option is rest in position of relief(generally lateral position with both knee bend),neurotopics such as mecobalamin and analgesics (
Diclofenac three times a day after meals is effective). Sometimes strong analgesic(such as
tramadol three times a day after meals) is required. Omeperazole before meals prevent acidity caused by analgesics . This method needs patience as it take longer treatment times sometimes up to 6 months.
Second option is go for surgical operation(
Discectomy).
You can discuss with your treating Doctor about it.I do hope that you have found something helpful and I will be glad to answer any further query. Take care.