I am 16 years old. i have a salivary stone inside my tongue, swelling in stensens duct and a sore throat. my doctor said that it is coindence. should i be worried?

Not in tongue: Stensens duct is in the parotid gland at the angle of you jaw. Mostly these stones pass on their own, sometimes they need to be coaxed by makind the gland secret with something like lemon drops. If it is becoming hot and painful and/or your having fevers it could be infected in which case you need antibiotics and sometimes surgical intervention. Sore throat could be inflammed lynph nodes.

Salivary stones: Salivary ducts are closely associated with the tongue, but they are not in the tongue. If you have a salivary stone, it can cause swelling of stensons duct because the stone plugs up the duct and doesn't allow saliva to freely pass into he mouth and it fills up with saliva. This will be right underneath the tongue, but not actually in it. You should see an ENT doctor as they can treat this.

See oral surgeon: Talk to your parents about this and have them schedule an appointment to have an oral surgeon or an ENT examine your tongue. That is the only way to know what is causing this lump.