Three possibilities which present with a white patch on the lips are Leukoplakia, Lichen planus (lacey pattern) and Vitiligo. Oral lichen planus is an inflammatory condition that affects mucous membranes inside the mouth. Treatment is available only on prescription and consists mainly of steroids,retinoids,hydroquinone and phototherapy. Also sometimes the trigger may be an allergen and in that case, you'll be advised to avoid the allergen, and you may consult an allergist.
Please discuss these possibilities with your dermatologist.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
Thank you so much for yor suggestion.Is this a very serious condition.Because i started to notice this when i was at age 13.Till now nothing much happened.but this started to spread.i am a bit worried about my condition.
I searched about the diseases you suggested but patches on my lips are not same.its nt tat worse.