Get full mouth xray or opg to rule out the cause and plan treatment. You can consult through this for prescription of medication based on clinical findings

I would personally like to examine the patient's mouth to identify the exact problem. There could be several reasons why a patient clench and grind her teeth from neurological or muscle related or any local irritation. Until it is completely treated, I would suggest the patient to wear a thick soft splint that protect the teeth from the excessive force exerted by the grinding or clenching which would damage her teeth.

Hello This is involuntary action.for this u have to consult neurophysician