Hello what I can understand from your question and your age it is mostly because of erupting wisdom tooth or third molar. This might sometimes cause something called as pericoronitis which is pretty painful

Hello It will be in your best interest to get a consultation with a dentist to get the cause of your pain identified and receive appropriate treatment for relief. A dentist has several methods to diagnose a oro facial related pain. Most common reasons for pain not permanently relieved with medication is cavity or decay on any tooth that may or may not be visible easily, non draining abscess or myofacial pain. Appropriate diagnosis and subsequent treatment will help to make you more comfortable. Hope you feel better soon!