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.
Menstrual Black Blood Remedy | Dark Brown Menstrual Bleeding Treatment. Black Blood in Menstruation: Because menstruation is a regular discharge of blood from the female body that was used to line up the uterine wall, any discoloration commonly causes alarm. This is because the normal color of menstrual flow is red.