The main objective is to compare the effect of nasal washing on nasal discharge and nasal congestion during treatment after 3 days of use.

The main endpoint is a symptom score derived from the Jackson scale: sum of 2 items relating to runny nose and nasal congestion (stuffy nose), with ratings of 0 to 3 for each (0: absent ; 1: mild; 2: moderate; 3: severe).

Inclusion Criteria:

• Person with an upper respiratory condition (cold, rhinitis, nasopharyngitis ...) with symptoms of nasal congestion and intense runny nose moderate to severe (Jackson derived score ≥ 4)
• Ability of the patient (for adults) or their legal representative (for children) to follow the guidelines of the medical device
• have given their written informed consent

Exclusion Criteria:

• Patient with no cold symptoms, including no nasal congestion (chronic dry rhinitis…)
• Patient under treatment with cortisone derivative, mucolytic, or medication containing pseudoephedrine or related product acting on nasal congestion or having used such a product in the 3 days before inclusion
• Patient who used a nasal wash product in the 3 days before inclusion
• Patient allergic to seafood, or to any of the components of the products under study
• Vulnerable patient whose inclusion is not justified by the research objectives: woman pregnant, parturient, psychiatric patient, or adult subject to legal protection
• Patient participating or having participated in any other clinical study in the 30 days before the study.