I have a hard white irrigation on the inside of the corner of lip, it feels swollen, i do wear dentures, im not sure what this is, the inside of my corner of lip feels tight?

You have denture stomatitis which is a fungal infection[thrush]. This is caused by wearing dentures for a long period of time, when sleeping, poor oral hygiene, a diet high in sugars and carbohydrates, smoking and alcohol use. Treatment is with anti-fungal medication, nystatin or miconazole that come in a lozenge or ointment form. See your dentist and keep dentures clean.