The evaluation of recurrent aphthous stomatitis (RAS) was performed by an oral medicine specialist, who relied on the clinical manifestations of the condition. The experimental group was administered 1x1cm mucosal patches containing alum stone at a concentration of 7%, whereas the control group was given placebo patches without any active medication. Size of aphthous lesions and degree of pain assessed at days 1, 3, and 5. Statistical analysis was performed with repeated measures ANOVA using R software.

The study's results indicated that the utilization of alum stone in mucosal adhesive patches yielded significant reductions in size of aphthous lesions and degree of pain.

Inclusion Criteria: individuals who had a history of RAS, with oral ulceration occurring at least once a month and persistent oral ulceration being present in the majority of patients. Additionally, individuals with mild aphthous ulcer, characterized by ulcer development lasting fewer than three days, were also included.

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Exclusion Criteria: Exclusion criteria encompassed the following: Pregnancy or lactation, systemic disorders linked to aphthous ulcers, such as Crohn's disease, Reiter's syndrome, and people who smoke or use cigarettes. Participants who were getting pharmacological therapy for fungal or viral infections, as well as those who were taking non-steroidal anti-inflammatory drugs, subjects with recent oral surgery, and those with fixed orthodontic appliances or retainers near the ulcer were not recruited for the study

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