Stephen Hawking: 'There is no heaven; it's a fairy story'. In an exclusive interview with the Guardian, the cosmologist shares his thoughts on death, M-theory, human purpose and our chance existence. , science correspondent. Sunday 15 May 2011 17.00 EDT First published on Sunday 15 May 2011 17.00 EDT.
Both the growth of a tumor and the repair of a scrape on the knee are similar because they involve a mass amount of blood cells in a particular area. A growth of a tumor is a huge mass of cells that form together an cause it. And like the forming tumor, when you get a scrape on your knee blood cells are clumped together forming a large mass of blood also. They are different because there isn't an opening to a tumor allowing blood cells to flow out. When there is a scrape on your knee, there is an opening/cut, allowing blood cells to flow out properly.
Read on to find out the most common causes of knee pain; whatever the cause may be, it is of utmost importance to get a condition like persistent knee pain checked. 1. Bursitis. Inflammation of one or more small sacs (also called bursa) cushioning the area of friction between joints of the knees is called Bursitis. Each of the knees has 11 bursae. Bursa which lies over the kneecap or on patella of a knee gets aggravated and becomes the reason for swelling, also causing knee pain. The condition can cause extreme pain and even limit your mobility. Use of anti-inflammatory medications can treat bursitis. However, you should call your doctor right away if you notice fever in addition to swelling of your knee.