Whereas rheumatoid arthritis is an autoimmune disease that causes joint malfunction due to inflammation, osteoarthritis is a mechanical disease brought on by the destruction of joints through wear and tear. Osteoarthritis is the most common form of arthritis, with approximately 27 million Americans over the age of 25 having been diagnosed with it.
A blood clot is a thick mass of menstrual blood that is expelled from your body when you menstruate. Clots are most common during the heaviest part of your flow â which is usually the first few days. Blood Clots look like chunky, jelly-like blobs that vary in size and color.
Brown Period Blood: Normal Menstrual Blood. There are some cases of periods wherein the discharge appears dark brown to almost black in color, specifically when the period cycle is almost over. This is considered normal because this occurs when blood is already old and was not released from the body quickly.hese blood clots vary in color from bright red to dark. Sometimes these clots are released during the heaviest flow of the period. The presence of clots in the flow of your menstruation may make the blood denser or thicker than usual and may appear brownish, hence brown period blood.