Dermatology Questions? Ask an Online Dermatologist.
Hello,I am Dr. Aren and I will help with your query.The possibility of a cold sore ,or oral herpes simplex(HSV1) needs to be ruled out.Other conditions will include persistent apthous ulcers,underlying Crohn's disease,solar dermatitis and Chronic cheilitis. You need to be checked by your PCP/Dermatologist who can investigate you for HSV1 and HSV2 by blood tests.Treatment will usually be specific to the cause .Antiviral therapy and local application of Docosanol will help if HSV1 is found.
Solar dermatitis due to prolonged exposure to sunlight is another possibility,you may need antiviral drugs along with Abreva for this to respond.You need to see a dermatologist to rule out any serious condition as 3 months is a fairly long time.