<s>[INST] I am just curious.. I was watching tv when I randomly decided to look at my tongue haha.. I looked at the underside and I have 2 very visible vein streaks on both sides of my tongue.. They are dark purple. I heard that a healthy tongue is when you can barely see the veins underneath or not at all but mine are very apparent. Every other part of my tongue is healthy though I believe.. Can you tell me why my tongues veins are so visible? [/INST] Thanks for your query, I have gone through your query. The visible veins under your tongue is nothing but a varicose veins. These are the dilated veins and are not harmful. Nothing to be panic, if there is any increase in size and if there is any bleeding, then consult an oral physician and get it evaluated. Otherthan that no treatment is required as such. I hope my answer will help you, take care. </s>