I am experiencing back pain (severity: severe) (side: lower). The following also describe me: Muscle cramps or spasms, Obesity, and Stiff joints. What should I do?

Examination required. to include x-rays, blood testing for rheumatoid variants, metabolic profile, diet planning and exercise program. If not allergic I would recommend Aleve 1 tab no more than every 8-12 hrs. on a full stomach., until seen.
Joints & Muscles. Please take a two-pronged approach. Start w/a visit to your doctor. You need to rule out or identify medical problems. Then ask your doctor about a ketogenic diet. It's easy enough and works well. Peace and good health.