Pregnant women with mouth ulcers need to go to the hospital to check whether there are irritating factors, and pay attention to keep the mouth clean and avoid irritating foods, etc. 1. Remove irritating factors. The cause of mouth ulcers may be due to the oral cavity has a sharp tooth tip or bad restorations, damage to the mucous membrane caused by ulcers, may also be due to changes in hormone levels or body resistance to reduce caused by the need to strengthen the exercise supplementation, improve the body’s immunity. 2. Oral cleanliness and avoidance of stimulation. After removing external stimuli, ulcers generally have the ability to heal themselves, daily attention to oral hygiene, adhere to morning and evening brushing, rinsing after meals, avoid eating some too acidic, too sweet or spicy food, avoid the stimulation of oral ulcers. Pregnant women with mouth ulcers, it is recommended to go to the hospital for examination, to remove the cause of the disease, and as far as possible to make it heal naturally.