it seems that it is a possibility rose, but she was very depressed and had lost a brother in a accident and reading the article, i get the feeling that there could be more to this than just a lumber procedure. In the N.H.S website it says that headaches are a side affect that can be treated, and if they persist or get worse then the patient should contact the hospital.
I think this case is very sad and that she went down hill after may well be a link.