Always being thirsty is a common sign of diabetes.
if you're constantly and always thirsty no matter how much you drink and are staying properly hydrated then you should see a doctor and let them know.
It would be good to get tested for diabetes because being always thirsty is one of the common signs of diabetes.
Diabetes is a serious thing and if you're not treated for the diabetes you could die.
However being always thirsty is not always a sure sign of diabetes and it doesn't mean you are diabetic when you're constantly thirsty.
You could also just be suffering from dry mouth syndrome and also some medications can make you thirsty and make your mouth dry out.
You might also be suffering from dehydration even though you're always thirsty and you could have another medical condition so get checked out by a doctor to be safe.