Spots on your mouth or tongue can result from infection, causing swelling, redness, and ulcers (i.e. cold sore/herpes, gingivitis, thrush, chicken pox). Allergic reactions to food or other substances can cause red and white spots on your mouth or tongue. Other causes of red and white spots are trauma, vitamin deficiencies (i.e. B12), antibiotics, smoking, canker sores, geographic tongue, and cancer.
A complete examination of the mouth by your prosthodontist is necessary to determine the cause of the spots on your mouth or tongue. Treatment may include removal of the cause of trauma, antibiotics, anti-viral medication, anti-fungal medications, creams, rinses, and tongue scraping.