Hi, Cutting with bleeding on the underside of tongue followed by soreness is indicative of the following sharp teeth that is misaligned is the usual cause, the fast eating or having rushed chewing adds on to the problems. Hence, the first step is to slow down your chewing habit, be quiet during eating, no speaking and see the difference. Also run a finger of the lower teeth to see whether there is any sharpness and consult a dentist to confirm and get treated by removing the sharpness or applying rounding cap. There can be another reasons like cancer or ulcer of the under-surface of tongue. This will be examined by a Dental Surgeon or ENT Surgeon and further management, investigations done as needed. Yes, you need to consult a Specialist to know the cause and get managed accordingly. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. T. Chandrakant, General Surgeon