How many times a day should you gargle with saline solution?

I frequently experience sore throats and find relief by gargling with physiological saline. How many times a day is it advisable to gargle? (Lam Nguyen, 25, Lam Dong)

Sore throat, also known as pharyngitis, involves inflammation of the pharyngeal lining. This condition typically causes discomfort such as a burning sensation, difficulty swallowing, an itchy throat, coughing, and hoarseness. It can also be accompanied by fever and swollen lymph nodes in the neck. While viruses are the most common cause, bacterial infections, allergies, gastroesophageal reflux disease, and exposure to dry or polluted air can also trigger pharyngitis.

Physiological saline, a 0.9% sodium chloride solution, has an osmotic pressure similar to the body's fluids, making it gentle on mucous membranes. Gargling with saline helps clear mucus, dust, and allergens from the throat's surface. It also moistens and warms the throat, alleviating dryness and discomfort.

It is important to understand that physiological saline does not kill bacteria or viruses. Therefore, while gargling with saline offers symptomatic relief, it is a supportive measure and not a substitute for medical treatment.

The optimal frequency for gargling with physiological saline varies based on individual health needs. For routine throat hygiene and disease prevention, gargling two times a day is recommended: once in the morning after waking up and once in the evening before sleep.

During episodes of pharyngitis, a burning throat, or tonsillitis, you may increase gargling to 3-4 times daily. It is best to gargle after meals or every few hours to keep the throat clean and minimize discomfort. However, avoid gargling excessively (more than 5 times a day), as this can dry out the throat's mucous membrane, increasing irritation and compromising its natural protective barrier.

Doctor Tu consulting a patient. *Illustration: Tam Anh General Hospital*

Always use sterile physiological saline purchased from pharmacies. Alongside gargling, ensure you get adequate rest, stay hydrated, keep your throat warm, and avoid irritants like tobacco smoke and dust to help manage the condition effectively.

For bacterial pharyngitis, particularly infections like Group A streptococcus, gargling alone will not resolve the underlying cause. Seek prompt medical attention from an ear, nose, and throat (ENT) specialist if you experience: