Conversation: The conversation between human and AI assistant.
[|Human|] The blood vessels under my tongue are bulging and swollen, thick and more bluish/black in color.  Last year a black spot was looked at by the ENT surgeon and he said to watch the spot for any changes. It has not changed but the veins under my tongue, below the spot, are 3/4 distended into my mouth, of the bed of the tongue.  I have no pain but it feels funny and looks horrible.
[|AI|]  Hello, Veins under the tongue or the lingual veins can appear large and dark, and it can be normal to see large veins under the tongue. At times there can be dilated veins under the tongue. As if there is no pain, you need not worry about it. However, if you have doubts, please send me pictures of the underside of the tongue and the black spot so that I can guide you better. Hope I have answered your query. Let me know if I can assist you further.