Can patients with oral ulcers add salt to their diet?

Patients with oral ulcers can consume salt in moderation as part of their diet, but should avoid direct contact between salt and the ulcerated area or eating overly salty foods, to prevent increased pain or delayed healing. If any physical discomfort occurs, it is recommended to seek medical attention promptly and follow professional medical advice for treatment.

As an essential component of daily diet, moderate salt intake helps maintain normal bodily metabolism. Gargling with mild saline solution can also help clean the mouth, reduce bacterial growth at the ulcer site, and assist in relieving inflammation. However, take care to use a low concentration of saltwater (approximately 0.9%, equivalent to physiological saline), spit it out after rinsing—do not swallow—and avoid prolonged contact of the saltwater with the ulcer surface.

Excessive dietary salt or consuming overly salty foods such as pickled vegetables and cured meats may stimulate nerve endings at the ulcer site, intensifying pain. It could also disrupt the normal osmotic pressure around the affected tissue, slowing the healing process. Moreover, directly applying salt crystals onto the ulcer is strongly discouraged, as it causes severe stinging and may lead to secondary tissue damage.

During episodes of oral ulcers, a light and balanced diet is recommended. Limit salt usage during cooking and increase intake of fresh fruits and vegetables to boost vitamin supply. Avoid spicy or excessively hot foods to promote faster healing. If an ulcer persists for more than two weeks without improvement, prompt medical evaluation is necessary.