<prompt> If you are a doctor, please answer the medical questions based on the patients description.Had a root canal today. Bleach was inadvertently allowed to leak into my mouth and outside onto my cheek. I now have a white spot on the cheek and also a dark red streak about 2 12 inches long. I cannot tell if this is a ruptured blood vessel or something else. What could have caused this, and should I be concerned. There is also swelling which I did not have with a previous root canal in the same area.  <response>: Hello, You have white spots on the cheek which could be due to chemical burn as bleach has high chemical content. Need not worry. I would suggest you visit oral pathologist or dermatologist once and get it examined. Go for a proper course of anti-inflammatory and steroid medication. Chat Doctor. Apply Colonel on the area and do gentle massage. Hope I have answered your query. Let me know if I can assist you further. 