Mouth ulcers in pregnant women may be traumatic mouth ulcers, recurrent mouth ulcers, and herpes mouth ulcers. Their treatments are similar and can be carried out through dietary adjustments, lifestyle adjustments and the use of medications. 1. Dietary adjustments: pregnant women with mouth ulcers, diet, do not eat spicy, briny, fried and other stimulating food, do not eat too hard food, so as not to aggravate the ulcers symptoms; can eat more vitamin B-rich as well as rich in trace elements such as zinc, copper, iron and other foods, can help the healing of mouth ulcers. 2. Lifestyle adjustment: pregnant women should maintain good oral hygiene, brush teeth and gargle after meals to ensure that the mouth is clean. Daily to drink more water, keep the mouth moist; at the same time, to ensure adequate sleep, avoid overwork, to strengthen physical exercise, improve the body’s immunity. 3. Topical drugs: pregnant women with more serious mouth ulcers, you can use chlorhexidine acetate gargle to relieve the symptoms of mouth ulcers. You can also take vitamin B₂ tablets, vitamin C tablets and other drugs to promote the recovery of mouth ulcers. Pregnant women with mouth ulcers, if the symptoms are not relieved after dietary adjustments and lifestyle modifications, they should consult a doctor in a timely manner and follow the doctor’s instructions for medication.