Chronic vomiting/regurgitation need to be addressed, because, yes, she may be suffering from esophageal/dental damage/metabolic disease if there is a gastric acid component.
Vomiting is different than regurgitation: vomiting is the stomach violently contracting to expel contents, regurgitation is the passive return of esophageal contents--there is no stomach component involved.
Routine blood work may not show any abnormalities, however further testing such as fluoroscopy/endoscopy may reveal the answer.
Alternatively, hypoallergenic/bland low-fat food trial may be of benefit if the situation warrants. There are numerous antiemetic (anti-vomiting) drugs available, but a firm diagnosis before medication makes the most sense.
Please consult your veterinarian for further diagnostics/assessments/treatment plans.
Dr. Van Lienden
Dr. Raymond Van Lienden DVM
The Animal Clinic of Clifton
12702 Chapel Road, Clifton
Virginia, U.S.A. 20124