The lip can be a focus of disease or show symptoms of a disease.
Abdominal dysfunction, diabetes
, peripheral neuropathy
, sun burn, chemical burn
, heat burn or cold are the posslble causes .The duration and course of lip burning sensation vary widely depending on the causes.
My advice is. apply Butter on your lips and keep them moist all time.
Apply aloe vera
gel and rub cucumber slices on the lip. Apply Glycerin on the lip.
Drink plenty of water and maintain constipation