Fire can cause nausea and vomiting because it is usually caused by conditions such as spleen and stomach disharmony and spleen and stomach deficiency cold. And there are also many undesirable symptoms, such as sore throat, sores on the mouth and tongue, loss of appetite, and difficulty in defecation. At this time, you should treat with medicine, you can take medicines to remove fire, such as Niuhuang Shangqing Pill and Qinggong Huanglian Pill. Pay attention to eating habits, do not eat spicy and cold food, spicy food is more likely to make people on fire, and usually can drink a lot of warm water, which can promote the discharge of toxins in the body. You can also eat fruits and vegetables that quench your thirst and moisten your lungs, such as white pears, apples, cucumbers, carrots, etc. You can also do exercises in your free time to enhance your physical fitness. If the condition is not relieved after a week, you need to go to a regular hospital and treat with medication under the guidance of a doctor.