Infectious causes include [[Feline Calicivirus|calicivirus]], [[Feline Herpesvirus 1|feline herpesvirus]], panleukopanenia, [[Fungi|fungal]], necrotising [[stomatitis]] and [[Leptospirosis - Cats and Dogs|leptospirosis]]. Physical causes may be irritation from [[Periodontal Disease|periodontal disease]], foreign bodies and trauma. Metabolic causes such as [[Uraemia|uraemia]], vitamin deficiencies and hypoparathyoidism can also be responsible. | Infectious causes include [[Feline Calicivirus|calicivirus]], [[Feline Herpesvirus 1|feline herpesvirus]], panleukopanenia, [[Fungi|fungal]], necrotising [[stomatitis]] and [[Leptospirosis - Cats and Dogs|leptospirosis]]. Physical causes may be irritation from [[Periodontal Disease|periodontal disease]], foreign bodies and trauma. Metabolic causes such as [[Uraemia|uraemia]], vitamin deficiencies and hypoparathyoidism can also be responsible. |