Since 5 days my left side on face feels swollen. And I'm having pain whole opening my mouth fully. Have tongue burn issues and sometimes ulcers too but tongue burn & ulcers goes away every time within a week also this time it's just 3 days. And it's recovering. And swollen face also decreased but what can be the reason behind the slight pain I'm facing while opening mouth? Can this be signs of cancer? Or swollen face just might be because of some sleeping position issues how much time should I give to get it recovered else after how many days I should visit doctor considering it's not normal. Thank you.