Why Do I Have Back and Leg Pain with Other Body Aches?

I am 39 years old and have been experiencing back pain for over 2 years. About a year ago, I started feeling pain in my lower back, which eventually subsided, but for the past 3 to 4 months, the pain has returned and now extends to my thigh and leg. When I wake up, the pain improves after some movement. I find it difficult to sleep straight in bed due to lipomas on my side waist that cause discomfort when pressed, resulting in pain. When I get out of bed, my body aches, and my legs feel weak and painful. Occasionally, I take a Nimesulide tablet, which provides relief for 5 to 6 days. Additionally, I experience pain in different parts of my body on different days, such as my chest, arms, and neck. What should I do?