Why are your lips burning?

Burning lips can be caused by various factors, including allergic reactions to cosmetics or food, sunburn, dehydration, or conditions like chapped lips or angular cheilitis. Certain medical conditions, such as herpes simplex virus or oral thrush, can also lead to a burning sensation. If the discomfort persists or is accompanied by other symptoms, it's advisable to consult a healthcare professional for a proper diagnosis and treatment.