Needing expert help. i have had this infection (blisters) in my mouth and it is leaving this salty taste on my lips. how do i get rid of this?

Hard to say: You either need to see your general doctor or a dermatologist who will take a good history and examine the inside of your mouth to try to figure out the diagnosis and the cause of these blisters. You may be using a product you are allergic to or have a viral infection. It is just too difficult for me to make a diagnosis with the information provided.