hi, I am getting pain in left upper premolar-molar are for no reason, only while biting. Went to dentist, but they are saying its clinically healthy, x-rays are also normal. One doctor identified it could be due to pressure points formed due to bruxism and has reduced them. I felt better, but the pain is coming again. It s not resolved completely. Can you please help me what it could be? Second issue is I am getting shock if I hum and my upper and lower premolar-molar area touch each other and I attempt to hum voice out. What could be the reason for this shock while singing?