I have been experience spasm like symptom, where I will go into a jerking like motion for 3-5 minutes and it take place in the left side area. during spasm, there is not much pain, but a lot of discomfort. I have a severe headache (one that sent me to the hospital) with a pain medicine called Florcet, the headache ease off in about 10 to 15 days. Now, I hove spasm like symptoms that are constant.