'Muscle convulsion' in lumbar region: Chance to cure it myself & without machines?

I have a tendency to getting 'muscle convulsion' in the lumbar region. I know that trigger point therapy is a highly efficient remedy: A therapist I used to go to (when I was still in that region) always solved the problem within minutes. Ie he started the dissolution process by 'working a little' on the trigger point, then it dissolved all by itself in the next hour or so.

My question would be, is it realistic to assume that I could remotely learn to do this, such that I could perform it on myself? If so, how exactly would I learn it?