Sponsored Topics. Marshfield is a city in Webster County, Missouri, United States. The population was 5,720 at the 2000 census. It is the county seat and part of the Springfield, Missouri Metropolitan Statistical Area. Marshfield was settled in 1830.
Another common cause of sinus headaches is allergic rhinitis (hay fever). Both prescription and nonprescription (over-the-counter, or OTC) oral medications â antihistamines, decongestants and corticosteroids â are used to treat it. 1  Antihistamines.
Treatment. Allergy Medications: An Overview. Learn all about the different over-the-counter and prescription medicines that can help ease annoying symptoms. Antihistamines. When medicine is needed to stem allergy symptoms, antihistamines are often first in line.reatment. Allergy Medications: An Overview. Learn all about the different over-the-counter and prescription medicines that can help ease annoying symptoms. Antihistamines. When medicine is needed to stem allergy symptoms, antihistamines are often first in line.