I have this thing under my tongue. really worried. does it look serious?

See your dentist soo: It could be something as simple as a sialolith, which is a calcified obstruction in your salivary duct or some other lesion. If theis " thing" that you refer to has been there for over two weeks, then you need to see your dentist soon.

We can't see you: We can only read your questions here. If you are worried, have a medical professional look at it. It might be nothing - but that way you'll relax. If you have a pharmacist you trust, you could ask their opinion and an OTC remedy suggestion.

Tongue: if you think something is there and it doesnt look or feel normal to you, go see your dentist for guidance.

See a dentist ASAP: Some conditions may require further assessment, tests and your dentist may book a follow-up appointment or refer you to a specialist to determine a diagnosis.

Internet Diagnosis: Lesions of any sort are best diagnosed by visual inspection. Please see an oral surgeon for peace of mind.