Thanks for using Health Care Magic. Read your query. Your problem suggest over usage of the mouth wash ,which has caused the burning of the skin ,tongue and cheeks. I would advice you to stop using that and for the pain you can take a ibuprofen Tablet if you are not allergic to any medication. Avoid spicy food and hot food for a while and sip lots of water. Apply mucogel/dentogel on the tissues two to three times daily. Do saline gargling. If still persisting ,visit your local dentist and get it checked up. Hope this was useful. Thanks and regards.