What is the redness, swelling, pain and burning sensation in the mouth?

Oral redness, swelling and pain with burning sensation may be caused by oral candida infection, Scheuglen’s syndrome and other diseases, as follows.
1. Oral Candida infection: such as chronic erythematous candidiasis, also known as denture stomatitis, the damage is often in the maxillary denture palate side contact palate, gingival mucosa, manifested as denture bearing area mucosal congestion in the form of punctate or flaky erythema and edema, mucosal burning pain.
2. Sjögren’s syndrome: the disease invades the exocrine glands resulting in reduced salivary secretion, dry, red, swollen and glossy oral mucosa, burning pain, and susceptibility to Candida infection.
There may be other reasons for the redness, swelling, pain and burning sensation in the mouth, and it is recommended to go to the hospital in time to receive targeted treatment as soon as possible.