The pain is more often in the forehead, but may be in the top or back of the head. The headache may last for hours, or “off and on” for days. Dull headache is seen in “biliousness” when the whites of the eyes are slightly tinged with yellow and the tongue coated and yellowish, and perhaps dizziness, disturbances of sight and a feeling of depression are present. Among other signs of headache due to indigestion are: discomfort in the stomach and bowels, constipation, nausea and vomiting, belching of wind, hiccough, and tender or painful eyeballs.
In a general way, treatment for this sort of headache consists in the use of a cathartic, such as calomel (three fifths of a grain) at night, followed by a Seidlitz powder or a tablespoonful of Epsom salts in a glass of cold water in the morning. A simple diet, as very small meals of milk, bread, toast, crackers with cereals, soups, and perhaps a little steak, chop, or fresh fish for a few days, may be sufficient to complete the cure.