What Causes Back Pain, Tiredness, Clicking In Knees And Swollen Muscles?

I have aching back pain,tiredness,no energy, itchy skin when hot, pin and needles im my hand some times if been in same position for a while, pains in My joints, swollen muscles in back of my knees, severe aching in my back,pain in my groin, varicus veins,clicking in my knees when walking or legs bent and im uncomfortable when trying to sleep and just sitting down and I feel miserable because of this what is wrong with me ?