My daughter just made 18 in October. In August, she had surgery to remove two uterine polyps. They were benign and I thought that we would not have to worry about it for a long time. She went to the doctor this week and the doctor noticed another polyp.

My question is, isn't it soon to have them return again. She just had the surgery 4 months ago.

My understanding is that uterine polyps grow very slowly so I suspect that they may have overlooked one.
Below is a link to answer your question in a more complete manner.
Diagnose-Me: Condition: Endometrial Polyps (http://www.diagnose-me.com/cond/C538623.html)