I have recurrent spasms in my back around the waist, it's quite painful but it doesn't last long, it's always on the left side.

If you have been experiencing recurrent spasms in your lower back for the past three months, it may be helpful to try using muscle relaxants and anti-inflammatories for short-term relief. However, it is important to consult a doctor for a proper evaluation of your condition, especially if the pain persists for more than seven days. They will be able to provide further advice and treatment options for your back pain.