👉 Haematomia, also known as haemorrhage or haematocytosis, is a condition where there's too much blood in the body. It can occur when a person has an allergic reaction or cuts themselves on their skin, which causes them to bleed more than they would normally. This bleeding can be caused by small pieces of blood that have been broken off from the wound and are now leaking out into the surrounding tissue. Haematomia is the most common type of ha