Generally speaking, the burn of the lips will not be too serious, because the lips belong to the mucosal structure, and the trauma is generally good, and no trace will be left after healing. Considering your specific situation, I personally suggest that you can apply some sesame oil locally at ordinary times, and don't use drugs for external use casually, because you don't know which drugs are inedible. Then it's time. 1 week will be better (people with good health will be faster). There is basically no good solution to the problem of pain. Although you can take some painkillers, I personally don't recommend it, because it won't hurt so much. Just bear it and you will get better soon.