Acidum Formicum Homeopathy Dilution is useful in Pains that appear suddenly, and move from place to place. Brain feels too heavy and large. Sensation as if a bubble burst in the forehead. Pains from the back of the right ear till the back of the head. Pain in extremities worse by motion and better by pressure. Right sided affections. Chronic stiffness in joints. Complaints from over lifting. Suited to chilly constitutions. Helps in arresting polyp like growths.