What is difficulty opening the mouth? The normal degree of mouth opening is about the width of the index finger, middle finger and ring finger when they are brought together. There are many clinical diseases that can cause mouth opening restriction, generally speaking, if the patient can only open the mouth to accommodate two fingers, it is called mild mouth opening restriction; if the mouth opening degree can only accommodate a finger, it is called moderate mouth opening restriction; if the mouth opening can not even accommodate a finger is called dental closure. So how should patients with mouth opening difficulties carry out dietary care? The diet must be seen 1. It is advisable to eat foods that promote wound healing; 2. It is advisable to eat antibacterial and anti-inflammatory foods; 3. It is advisable to eat foods that promote the absorption of nutrients. Suitable to eat: 1, aloe vera aloe-emodin A, trauma hormone and glycopeptide mannitol to promote wound healing and recovery, anti-inflammatory and antiseptic, heat absorption and swelling, softening the skin, maintaining the function of cell viability, gel polysaccharide and healing acid combined also has healing wound activity. 100-200 grams per day is appropriate, steamed eating is better. 2.Lemon Lemon is rich in vitamin C, which is like a natural antibiotic with antibacterial and anti-inflammatory effects, playing a role in preventing infection and facilitating the recovery of patients. It is appropriate to drink 300-500 ml of water every day. 3, winter melon is a dietary fiber food, has to promote appetite, promote the absorption of nutrients, conducive to the recovery of the patient’s body. 200-300 grams per day is appropriate. Avoid eating diet must see 1, avoid eating pickled food; such as salted eggs, salted fish, salted meat; 2, avoid eating greasy food; lard, fatty meat, lamb fat; 3, avoid eating food that is easy to produce gas; such as onions, sweet potatoes, soybeans. Avoid eating: 1, salted fish Salted fish is a food containing a large amount of edible salt, which can easily lead to water sodium storage slip, leading to edema in the limbs and aggravate the pain caused by soft tissue injury in the oral and maxillofacial area. It is appropriate to eat low-salt food. 2, lard lard is rich in a large amount of fat, easy to nourish bacteria, leading to inflammatory infections, is not conducive to the recovery of the patient’s body. It is advisable to eat low-fat food. Soya beans are gas-producing foods, which can easily lead to intestinal flatulence and slow intestinal peristalsis, affecting the absorption of nutrients in the intestine, which is not conducive to the patient’s recovery. It is advisable to eat non-gas-producing food.