It's about 7 months since my blood transfusion due to anemia. Recently, I have developed shoulder, hip, knee and low back muscle spams. It is difficult to rise from a seated position after just 20 minutes or so. It is difficult to climb stairs because my legs feel weak. I have a general off and on feeling of fatique which lasts 2-3 days, then I have a short reprieve of energy. Could this be related to the blood transfusion?