Hello
Thanks for your query, I have gone through your query. The sub mandibular salivary gland swelling could be because of stone or any bacterial infection or viral infection. Consult an oral physician and get your self examined completely and get an ultrasound and FNAC done to rule out any tumor or any other pathology. There USNO relationship between RCT and swelling of salivary gland. I hope my answer will help you. Take care.