Onions taken internally were considered to be an effective cure for sinusitis.
Watercress, also taken internally, was thought to bring relief, as was plantain. Elderflowers, with their supposed decongestant properties, and a decoction of eucalyptus leaves, also with supposed decongestant properties, were held to be remedies for sinusitis.
Sage taken at the start of any sign of infection was thought to be curative. Both honey and
tea were thought to be beneficial in the treatment of sinusitis.
Thyme oil, used as an inhalant, was considered to bring about the relief of sinusitis. Chamomile oil was also used in this way to the same effect.