Garlic, especially raw garlic, is generally not recommended for people with mouth ulcers. If you need to eat garlic, you can consume a small amount of sautéed garlic. Mouth ulcers are painful sores that appear inside the mouth, manifested as painful ulcers, which may be accompanied by headache, low-grade fever, fatigue and other symptoms. Garlic is highly irritating, and raw garlic is even more irritating. If raw garlic is consumed, it will easily irritate the sores and aggravate the pain, so it is not recommended to consume raw garlic during the period of mouth ulcers. Therefore, it is not recommended to consume raw garlic during the period of mouth ulcers. If you need to consume garlic, you can consume a small amount of sautéed or boiled garlic. In general, if you have mouth ulcers with pain, you can use topical lidocaine or benzocaine gel or spray to relieve pain, or use medications such as Fludrocortisone cream or beclomethasone propionate spray. If discomfort occurs, you should seek medical treatment in a timely manner and standardize the use of medication under the guidance of a doctor. During the period of illness, spicy, too acidic and other stimulating foods should be avoided.