Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain Burning sensation inside mouth, cheeks and lips seems to be due to a condition known as
Burning Mouth Syndrome..
It can occur due to a number of causes like
nutritional deficiency of iron and
vitamin B12, dry mouth or
xerostomia, stress,
acid reflux, side effects of medicines etc..
I would suggest you to consult an Oral Physician and get evaluated and a thorough clinical examination and investigations like blood tests can be advised..
Treatment of underlying cause will resolve the symptoms..
As of now to get relieved you can start gargling with a numbing mouthwash containing Lignocaine..
Take anti inflammatory painkiller like Ibuprofen..
Avoid spicy foods and take a soft bland diet..
Suck ice pops..
In case of no improvement a Neurological consultation can be done to rule out the exact cause of the problem and if there is any neurological problem so that it can be treated accordingly..
Hope this helps..
Regards.