<prompt> Mucosa is involved inPsoriasisLichen planusAlopeciaScabies  <response>: Diseases involving oral mucosa :- Lichen plaints, Pemphigus, Infections Candida, Secondary syphilis, HSV, Leucoplakia, Erythema multiforme, Peutz Jegher syndrome, Aphthous ulcers, Bechets disease, squamous cell carcinoma 