Gum cancer is a kind of common oral cancer, and its early symptoms mainly include painless ulcers, lumps, cauliflower-like or granulomatous growths on the surface of gums, and some gum cancers may cause numbness of lips and other problems. 1. Painless ulcers: some painless ulcers may appear on the surface of gums in the early stage of gum cancer, which are difficult to heal after treatment, and the ulcers’ area has the tendency of expanding continuously. 2. Lumps: lumps may appear on the gums in early stage of gum cancer, and the growth of lumps may easily cause loose teeth and other problems. 3. Cauliflower-like or granulation-like growths: cauliflower-like or granulation-like growths may appear on the surface of gums in early stage of gum cancer, which may easily cause bleeding and pus in gums, often accompanied by pain, and the growths will keep on growing with the passage of time. 4. Numbness of lips: Gum cancer occurring in the upper or lower jaw may cause nerve dysfunction, thus leading to numbness of lips. If there are early symptoms of gum cancer, one should go to the hospital in time for complete examination, clear diagnosis and early targeted treatment in order to improve the survival rate.