What causes blisters on the inner lip?
Patient: Hi. I am a long time smoker and have been trying to quit. I also have M.S. and have been on almost every drug they make for it.  I have noticed blisters on the inside of my lower lip for about six months.  They don't hurt but I have noticed the first one is bigger and now they are spreading. Doctor: Hi..Thanks for the query..Blisters on the inside of the lip that are present since 6 months is not a normal finding..Normally the blisters or sores in mouth that are caused by common causes like canker sores or viral infection causing fever blisters are cured within 1-2 weeks.. So blisters lasting for about 6 months and even spreading needs evaluation..You should consult an Oral Physician and get evaluated and a thorough clinical examination should be done.If needed a Biopsy can be done for confirmation..As of now the first thing that you should do is to stop smoking..Secondly you can start gargling with warm saline solution..You should take a multivitamin tablet daily..Hope this helps.Regards.