Sec. 90. The Cause of this Disease then is exactly the same with that of the former, that is, an Inflammation of the Lungs; but an Inflammation, that seems rather a little more external. The only considerable Difference in the Symptoms is, that the Pleurisy is accompanied with a most acute Pain under the Ribs, and which is commonly termed a _Stitch_. This Pain is felt indifferently over every Part of the Breast; though more commonly about the Sides, under the more fleshy Parts of the Breast, and oftenest on the right Side. The Pain is greatly increased whenever the Patient coughs or draws in the Air in breathing; and hence a Fear of increasing it, by making some Patients forbear to cough or respire, as much as they possibly can; and that aggravates the Disease, by stopping the Course of the Blood in the Lungs, which are soon overcharged with it. Hence the Inflammation of this Bowel becomes general; the Blood mounts up to the Head; the Countenance looks deeply red, or as it were livid; the Patient becomes nearly suffocated, and falls into the State described Sec. 47. Sometimes the Pain is so extremely violent, that if the Cough is very urgent at the same Time, and the Sick cannot suppress or restrain it, they are seized with Convulsions, of which I have seen many Instances, but these occur almost always to Women; though they are much less subject than Men to this Disease, and indeed to all inflammatory ones. It may be proper however to observe here, that if Women should be attacked with it, during their monthly Discharges, that Circumstance should not prevent the repeated and necessary Bleedings, nor occasion any Alteration in the Treatment of the Disease. And hence it appears, that the Pleurisy is really an Inflammation of the Lungs, accompanied with acute Pain. Sec. 91. I am sensible that sometimes an Inflammation of the Lungs is communicated also to that Membrane, which lines the Inside of the Breast; and which is called the _Pleura_; and from thence to the Muscles, the fleshy Parts, over and between the Ribs. This however is not very frequently the Case.