We always apparently wonder during our lives as to why we have been exactly how were. Why do we behave in the certain method in which others don't? Why is it that I and my sibling or my best friend has different likes, choices and hobbies? And most importantly, why are we different from each other in any way? The most commonly affected joints are those in: hands, spine, knee, buttocks So, if you want to get a strong libido, check out the Best Libido Booster for men that has helped thousands of men over the past decade. In the case of RA, you may feel tired or suffer from loss of appetite due to inflammation caused by immune system activity. You may also become anemic - meaning you have fewer red blood cells - or have a mild fever. Severe RA may lead to joint deformities, if not treated.