 [ Symptoms ] i have a bump underneath the tip of my tongue what is it  i have a sort of bubble like thing underneath the tip of my tongue it is red and sticks out a good half inch it is very tender and hurts when it is squeezed if you look closely at it you can see a blood vessel what is this [ Disease ] i really do not now since i have no way of seeing this lesion and examining you a vague description really is not sufficient to make this important diagnostic call so i suggest that you see your medical provider or even dentist to have this bubble properly identified