Sinusitis Usually caused by bacteria. Thick, pus-like, greenish or yellowish nasal discharge. Throbbing headache, especially when leaning forward. Worsens after several days. Usually responsive to antibiotics.
Allergies Cause by exposure to pollen or other allergens.
Watery, itchy, red eyes. Profuse, watery nasal discharge. Headache or sinus pain. Itching in throat and sneezing. Responsive to antihistamines rather than antibiotics.