The appearance of aphthous stomatitis varies as there are 3 types, namely minor aphthous ulceration, major aphthous ulceration and herpetiform ulceration.
Whereas uncommon side effects (occurring in 0.1-1% of those treated with the drug) include: constipation, oral thrush, stomatitis, taste disturbance, thrombocytopenia and hives.
Aphthous stomatitis has no clinically detectable signs or symptoms outside the mouth, but the recurrent ulceration can cause much discomfort to sufferers.
The first line therapy for aphthous stomatitis is topical agents rather than systemic medication, with topical corticosteroids being the mainstay treatment.