I have been getting muselspasems throught my lower part of body even in upper thigh. 1-2x per week what could cause this and how can I stop this?

Hard to say. It's hard to say, but it is time to go see a doctor or health clinic and get some lab work. Sometimes an electrolyte imbalance is the issue. If you take any meds, they could be involved. Don't start any supplements and don't stop your meds until you and a doctor talk about it.