How Should A Lip Spot Due To Trauma Be Treated?

Hi I had a spot inside my lower lip I went to a doctor for a check up as he said there is nothing to worry as I unknowingly had bit the lip or something hard had bit me it was a big spot and now it has minimized in size but for a few days I see that slowly the colour is fading but I am still restless was chewing mawa and I do smoke