I Have A 15 Year Old Daughter, Who Had Her

I have a 15 year old daughter, who had her appendix removed on December 22nd. Prior to this, she was throwing up her food 5-7 times each time she tried to eat. This went on for 5 weeks. Once she had her appendix out, the puking stopped. However, it is now 4 weeks after the procedure and it has started back up. Any ideas?