I am Dr. Mukesh Asrani, an Oral Medicine Specialist, and would like to help you regarding your problem. The most common cause of salty taste at this age could be dehydration
as this makes the saliva salty. Other causes include diabetes
as it can alter the taste sensation, some components of toothpaste and mouthwash, gum diseases, cough, Gastro oesophegal refulx disease and many medications which alter the taste.
I would advise you to take plenty of water, lime juice and chew sugar free gums. Also get your diabetes checked. If you have changed your tooth paste or mouthwash, go back to previous one and also rule out other causes.
related diseases like Burning mouth syndrome
can also lead to altered taste
. If you don't get releif by the above mentioned advise, you should consult your Oral Physician, he will help you regarding this condition.
Wish you a good health. Take care.
Dr. Mukesh Asrani