Left side of mouth pain. From coming in!

As u have not specified particular region of ur left side of mouth I LL just list down various causes and u can relate them with your complaint. 1) If pain is particularly in gum of recently extrcted wisdom tooth then it may be due to extracted socket wound which must be healing. 2)if it is in all gums of left side then it may be due to accumulation of debris or calculus .it can be corrected by scaling. 3) if pain is in muscles of left side of mouth then u need to visit a dentist .it's mostly due to stress or improper alignment of teeth. It can be corrected by correction of tooth or by muscle relaxant 4) if pain is in joint of left side then it is related to your TMJ .u again need to visit an oral and maxillofacial surgeon for that to rule out TMJ problem and treatment will be accordingly.