“…Studies have shown that RAS can have many pre‐disposing factors including stress, nutritional deficiencies, trauma, hormonal changes, and diet. Other contributors may be psychological factors, and there are occasional associations with Coeliac disease and other immunological disorders (4, 5) found that RAS appears to have an immuno‐genetic background, with an association with a positive family history in some cases, weak histocompatibility locus antigen (HLA) associations (6), and the implication of heat shock proteins (7). There may also be associations with immunologically related diseases, such as immunodeficiencies, various allergies and atopic disease (8).…”