I have a hard rigid line that formed on the bottom of my lower lip, progressively my lips have become swollen and sore.  I have been applying different balms for just over a week.  Yesterday morning I had a small crack, today I started using Bees balm and it seems to be helping but I have sores just inside my lower lip as well.  The rigid line seems to be not as bad tonight.  Could I have sunburned my lips without knowing or do I need to worry about mouth cancer?  I do smoke.
Hello, Welcome to Chat Doctor forum. Thanks for posting your query. Smoking can obviously lead into PRECANCEROUS lesions of oral mucosa including lips. A thorough clinical as well as biopsy investigation is necessary to plan the treatment. I would advise you to quit smoking. Tab.COSTAR as well as IRON supplements has to be administered. Meanwhile, maintain oral hygiene well. Brush and floss your teeth as well as tongue daily. Take nutritious diet including fruits and leafy vegetables. Avoid spicy foods. Hope this helps out. Take care.