Hello, my mother recently had a vitrectomy on July 1, 2014 for a vitreous hemorrhage in her right eye and after meeting post-op with the ophthalmologist treating her, who also performed the vitrectomy, it appeared the everything was fine. However since then she has had nausea and vomiting and she has told me that she also has a throbbing sensation in her head. We were told that she could drink and eat normally, but she has been throwing up almost everything that she has eaten. Is it normal for this to occur and is there any way to stop or lessen the vomiting?