discharge of saliva from extracted wisdom teeth also tongue tastes salty

from March this year my mouth and tongue felt different

after my extracted wisdom tooth , I started to have salivery foam from the

extracted area and my tongue tastes salty and whatever I eat taste salty.

I use warm salt water to rinse my mouth after meal and uses it two to three times

a day. floss my teeth but still salty feeling persist.

I can feel the salivery foam coming out from the extracted area and my tongue

kept having saltish feelings .

What is wrong ?

Dentist told me absolutely nothing is wrong with my teeth, is it the gum then ??