Urgo Aphthous Ulcer Junior Gel URGO Aphthous Ulcer Gel Junior is a medical device used to support the treatment of aphthous ulcers (mouth ulcers), aphthous stomatitis, and minor mouth sores. Once applied, the gel protects the sore by forming a physical barrier. Selected natural extracts soothe painful symptoms, promote wound healing, and reduce the risk of further inflammation. It does not sting, contains no alcohol or sugar, and can be used by adults and children aged 3 and older.