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Haemolacria can manifest as tears ranging from merely red-tinged to appearing to be entirely made of blood, [1] and may also be indicative of a tumor in the lacrimal apparatus. It is most often provoked by local factors such as bacterial conjunctivitis , environmental damage or injuries. [ 2 ]
The colour blood red is a dark shade of the colour red meant to resemble the colour of human blood (which is composed of oxygenated red erythrocytes, white leukocytes, and yellow blood plasma). [2] It is the iron in hemoglobin specifically that gives blood its red colour. The actual colour ranges from crimson to a dark brown-blood depending on ...
Schamberg's disease is caused by leaky blood vessels near the surface of the skin, capillaries, which allow red blood cells to slip through into the skin. [3] The red blood cells in the skin then fall apart and release their iron, which is released from hemoglobin. [3] The iron causes a rust color and this accounts for the orange tint of the ...
The presence of bright red blood in stool, known as hematochezia, typically indicates lower gastrointestinal bleeding. Digested blood from the upper gastrointestinal tract may appear black rather than red, resulting in "coffee ground" vomit or melena. [2] Other signs and symptoms include feeling tired, dizziness, and pale skin color. [18] A ...
Other blood group incompatibility (RhC, Rhe, Kid, Duffy, MN, P and others) Drug induced immune mediated hemolytic anemia Penicillin (high dose) Methyldopa; Hemoglobinopathies (where these is an unstable or crystalline hemoglobin) Paroxysmal nocturnal hemoglobinuria (rare acquired clonal disorder of red blood cell surface proteins)
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This is usually vomit that contains bright red blood. [2] Coffee ground vomiting is similar to hematemesis, but is distinct in not involving bright red blood. [3] Hematemesis must be differentiated from hemoptysis (coughing up blood) and epistaxis (nosebleed). [4] Both of these are more common conditions. These may be difficult to distinguish.
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