Write an article based on this "Look for ulcers and sores on your lips, tongue, cheeks and the floor of your mouth. Check for color changes or colored patches inside your mouth. Identify feelings of numbness or pain in any part of your mouth. Look for rough, crusted patches around your mouth and lips. Inspect your teeth to check for any changes in their alignment."
Mouth ulcers are very common and are not a surefire sign of mouth cancer in and of themselves. However, when mouth ulcers are combined with other symptoms and their development follows a certain pattern, they may indicate cancer.  Look for mouth ulcers which have not healed in over two or three weeks.  Look for mouth ulcers that recur in the same areas of the mouth over and over again. Look for mouth ulcers with irregular borders, that bleed at the slightest touch. Look for color changes on the surface/sides of the tongue, lips and inside of the cheeks that last for more than two weeks.  These color changes may be red, white, grey or dark in color. You may also notice velvety white and red patches inside your mouth. You might experience a numb sensation in any area of the mouth, face and neck region as a symptom of cancer.  You may also feel a non-stop pain/tenderness in a particular area of your mouth. If you experience any of these two symptoms with or without swelling/lumps, then you should visit your doctor immediately These crusted patches may feel rough to the touch, have irregular borders and bleed without provocation. Examine your teeth carefully to check for any changes in their alignment. Also look for any loose teeth, as this can also be an indication of mouth cancer. One good way to tell if the alignment of your teeth has changed is to try wearing your dentures (if you use them). Difficulty in fitting the dentures inside your mouth is a good indication that your teeth have moved.