Psoriasis is a skin condition that creates red, thickened patches or silvery, scaly spots on the skin's surface. It occurs as an immune system disorder wherein skin cells reproduce faster than usual. Because the body can't shed these extra skin cells quickly enough, scaly spots or thickened areas called plaques develop, as described by the American Osteopathic College of Dermatology.
Although it is genetic, it usually occurs in outbreaks triggered by stress, illness, medications, alcohol, nicotine or even sunlight. Psoriasis mouth symptoms occur when the cellular issue spreads to this part of the body.