Vrana or an ulcer is formed secondary to inflammation (paka) of a swelling. Since this swelling is for the causation of a vrana or leads to the formation of an ulcer, it is called vrana shotha. Vrana sotha is that condition, which is characterised by the following features:- Like in granthi, vidradhi, Alaji etc there is a swelling It is hard (granthita) It is regular or irregular (Sama/visama) Located in the plane of skin and muscles (twak Mansa sthayi) It is localised lesion. Though it is also a swelling, it is different from granthi, vidradhi or Alaji. Thus here vrana sotha indicates the inflammatory stage, which leads to the causation of a localised collection of pus, which once suppurated or improperly treated causes ulcer (vrana). Thus Vrana sotha --> Vidradhi --> Vrana The causes may be either intrinsic (due to vitiated dosa) or extrensic (agantuja). Note- When trauma, chemicals, heat or any other causes, produces injury to the tissue, a...
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