When bleeding occurs at the free surface of the body, the blood usually passes away and is lost. On the other hand, it may take place into an existing cavity, or the blood may make a cavity for itself by tearing. Sometimes the blood in such a cavity forms a distinct tumour-like mass, which may be somewhat permanent; this condition is called Hsematoma. If the blood permeates the interstices of the tissues without tearing, the condition is called haemorrhagic infiltration. Infiltration of the skin or subcutaneous tissue is called Ecchymosis or Sugillation. Small patches of haemorrhage in the skin arising chiefly in purpura and acute fevers are called Petechias or Vibices.

Certain haemorrhages have received special names; thus, Epistaxis is bleeding from the nose, Hsematemesis from the stomach, Haemoptysis from the respiratory organs, Metrorrhagia from the uterus, Hematuria from the urinary organs. When blood accumulates in cavities, special names are sometimes given; thus in the case of the uterus, Haematometra; of the pleura, Hemothorax; of the pericardium, Haemopericardium; of the tunica vaginalis of the testicle, Hematocele.