The invention provides a composition comprising a selenite-containing compound and a pharmaceutically acceptable acid selected from the group consisting of citric acid, acetic acid, malic acid, carbonic acid, sulfuric acid, nitric acid, hydrochloric acid, a fruit acid and mixtures thereof； which composition is useful for treating or preventing inflammatory periodontal disease, mycosis, sunburn or an insect bite； or accelerating healing of an inflammatory burn or wound.
