What is on my lip

I have a white circular spot on my lip,It is not raised and if i push my  tounge to lower lip to spread in out it appears white and almost like a blemish. Could this be a wart or just a spot from smoking. I need help

[Dr_Aparna]

Hi,
A small, smooth flattened wart, tan or flesh coloured, which can occur in large numbers is seen most commonly  on the face, neck, hands, wrists and knees.
One of the most obvious symptoms of smoking is stained teeth and lips.  This is because smoking reduces blood flow and saliva to the mouth and raises the mouth's temperature, damaging and killing important oral tissue cells.
For lips, the best solution is to cut down on, or quit the habit. Otherwise, make sure you drink several glasses of water a day to flush toxins away and apply Vaseline to your lips regularly. You can also use lemon juice on the lips daily, which will help to lighten the stain over time.
ref:http://www.stainexpert.co.uk/SmokingItCanStainYourLife.html
IT is best that you quit( Are you a heavy smoker?) if you are.
You can try Imiquimod, a topical cream that helps the body's immune system fight the wart virus by encouraging interferon production.
ref:http://en.wikipedia.org/wiki/Wart