Canker sore
MONDO:0005318A type of stomatitis that is characterized by small white ulcerative lesions, single or multiple, round or oval, lasting for 7-14 days and healing without scarring. It is a recurrent disease of the oral mucosa of unknown etiology.
Also known as: aphthous ulcer, canker sore, aphthous stomatitis
22 clinical trials for this condition and its sub-types.
Follow this condition — get notified about new trialsBroader categories
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New drug aims to silence painful mouth ulcers
Disease control Recruiting nowThis Phase 3 trial tests whether the drug apremilast can completely clear painful mouth ulcers in people with severe recurrent aphthous stomatitis (RAS) that hasn't responded to colchicine. About 134 adults will receive either apremilast or a placebo twice daily for 12 weeks, fol…
Phase: PHASE3 • Sponsor: University Hospital, Rouen • Aim: Disease control
Last updated Jun 27, 2026 09:06 UTC
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New PET tracer aims to reveal hidden inflammation in cancer patients
Diagnosis Recruiting nowThis early-stage study tests a new imaging agent called 18F-4FN for PET scans to safely detect inflammation in the body. It involves 55 adults with cancer who are on immunotherapy or have suspected inflammation. The goal is to see if this agent can highlight areas of inflammation…
Phase: PHASE1 • Sponsor: M.D. Anderson Cancer Center • Aim: Diagnosis
Last updated Jun 27, 2026 12:36 UTC
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New oral spray aims to ease sore throat and canker sores without drugs
Symptom relief Recruiting nowThis study is testing an oral spray called OROSEDAL to see if it helps relieve pain from sore throats, canker sores, and other minor mouth lesions. About 124 children and adults will use the spray as prescribed and report their pain levels over 6 days. The spray works by forming …
Sponsor: Laboratoires Elerte • Aim: Symptom relief
Last updated Jun 27, 2026 13:00 UTC
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Could a special gel make canker sores disappear faster?
Symptom relief Recruiting nowThis study tests whether an oxygenated gel can reduce pain and speed up healing of canker sores (aphthous ulcers) compared to a standard steroid gel. Thirty adults with a single small ulcer will apply the gel twice daily for 7 days. Researchers will check pain levels and ulcer si…
Phase: PHASE2, PHASE3 • Sponsor: British University In Egypt • Aim: Symptom relief
Last updated Jun 26, 2026 18:18 UTC
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Scientists seek clues to mysterious childhood fever syndrome
Knowledge-focused Recruiting nowThis study aims to learn more about PFAPA, a condition that causes repeated fevers, sore throats, and mouth sores in children. Researchers will collect blood, saliva, stool, and tonsil tissue from 1,500 people with PFAPA or other tonsil problems. No treatment is given; the goal i…
Sponsor: National Institute of Allergy and Infectious Diseases (NIAID) • Aim: Knowledge-focused
Last updated Jun 27, 2026 12:05 UTC
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Scientists track prednisolone levels to improve dosing for inflammatory conditions
Knowledge-focused Recruiting nowThis pilot study is measuring prednisolone levels in 120 people with inflammatory diseases like thyroid eye disease, vasculitis, COPD, asthma, and others. Participants take high-dose prednisolone as part of their routine care, and researchers take timed blood samples to see how t…
Sponsor: Imperial College London • Aim: Knowledge-focused
Last updated Jun 27, 2026 12:01 UTC
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When to boost? new trial seeks best COVID-19 shot timing for vulnerable patients
Knowledge-focused Recruiting nowThis study looks at 320 adults who are about to start strong immune-suppressing therapy and have already had at least two COVID-19 shots. Researchers want to find out if giving a COVID-19 booster right before starting therapy or waiting six months provides better protection. Part…
Phase: PHASE3 • Sponsor: Kirby Institute • Aim: Knowledge-focused
Last updated Jun 27, 2026 09:08 UTC