Generally speaking, for recurrent oral ulcers, due to hormonal changes during pregnancy, most female patients experience fewer occurrences of oral ulcers. If oral ulcers occur during pregnancy, treatment can be based on the cause: First, if the oral ulcers are caused by bites or burns, Kangfuxin solution or watermelon frost spray can be used for local treatment to accelerate the healing of the ulcer. Second, if the oral ulcers are due to vitamin deficiency, the patient should pay attention to oral hygiene and can appropriately take oral vitamin tablets to enhance resistance and promote the healing of the ulcer. During the outbreak of ulcers, it is important to avoid eating spicy and irritating foods, and antibiotics are not needed for oral ulcers. (Medication should be used under the guidance of a physician.)