Many of us have constant problems with our lips: fever, cracks, chapping. To avoid this, you must clearly find out the cause of the disease. Many of us have constant problems with our lips: fever, cracks, chapping. To avoid this, you must clearly find out the cause of the disease. Cracks in the corners of the lips Cause: Streptococcal infection, lack of iron and carotene, spicy foods. ? What to do First of all, you need to adjust your diet.