Possible causes of numbness and uncomfortable feeling after tongue cancer surgery include surgical injury, wisdom tooth pericoronitis, gum cancer or postoperative infection. 1. Surgical injury: after tongue cancer surgery, due to the damage to lingual nerve in the process of surgery, there is numbness, so there is numbness and uncomfortable feeling after tongue cancer surgery. 2. Wisdom tooth pericoronitis: not all tongue cancer patients will have numb uncomfortable feeling after surgery, when patients suffer from wisdom tooth pericoronitis at the same time, the inflammation invades the lingual nerve and causes nerve inflammation damage, so patients with wisdom tooth pericoronitis may have numb uncomfortable feeling. 3. Gingival cancer: When the tumor presses or the cancer cells invade the lingual nerve, it will cause the damage of the nerve, so the patients with gingival cancer may have the uncomfortable feeling of numbness. 4. Postoperative infection: If tongue cancer patients have infection after operation, similar symptoms may occur, then they need to consult doctor in time, and carry out anti-infection treatment after clear diagnosis. When there is numbness and uncomfortable feeling after tongue cancer surgery, patients should go to the hospital for further examination and treatment under the guidance of professional doctors, and do not use medicine by themselves.