Can I use Xigua Shuang spray for mouth ulcers?

Yes, Xigua Shuang (Watermelon Frost) spray can be used for the symptomatic management of recurrent aphthous ulcers (commonly known as canker sores). This traditional Chinese medicine preparation contains a combination of herbal ingredients—including watermelon frost, borneol, and menthol—as well as antimicrobial agents such as borax and sodium nitrate. Its proposed mechanisms include local anti-inflammatory effects, mild analgesia, promotion of epithelial healing, and reduction of bacterial load at the ulcer site.

While clinical evidence supporting its efficacy is primarily derived from small-scale or traditional practice-based studies rather than large randomized controlled trials, many patients report subjective improvement in pain and accelerated healing when applied topically several times daily. It is generally considered safe for short-term use in adults and older children; however, it should not be used in infants or young children due to the risk of aspiration or accidental ingestion of potentially irritating components.

It’s important to note that Xigua Shuang spray treats symptoms but does not address underlying causes—such as nutritional deficiencies (e.g., iron, folate, vitamin B12), immune dysregulation, gastrointestinal conditions (e.g., celiac disease, inflammatory bowel disease), or stress-related triggers. If ulcers are unusually large (>1 cm), persist longer than 3 weeks, occur frequently (more than 3–4 episodes per year), or are accompanied by systemic symptoms (e.g., fever, weight loss, skin or genital lesions), further medical evaluation is warranted to rule out complex aphthosis or other systemic disorders.

As with any topical oral agent, discontinue use if irritation, allergic reaction, or worsening symptoms occurs. For patients seeking evidence-based alternatives, prescription options such as topical corticosteroids (e.g., triamcinolone acetonide dental paste) or over-the-counter treatments like benzocaine gels may also be considered, depending on severity and individual factors.