###Human: What is the reason for continually leaking saliva with a bubble in lower lip? ###Assistant: Hi. I have seen your pictures (attachment removed to protect patient identity). You have malfunctioning of the salivary gland that is causing blisters at the lower side of your tongue and most probably on the lip as well. Put an oral gel Chlorhexidine gluconate with or without Metronidazole on the lower lip ulcer. This may help in healing temporarily. Visit an oral and maxillofacial surgeon in your area. Then he will do some tests and radiographs and will treat this disease accordingly. This is not the case to be treated by a general dentist. That is why visiting oral and maxillofacial surgeon is recommended. Take care. Stay happy and blessed. Give me the followup after visiting the surgeon.