Nausea and uncomfortable are usually caused by the following reasons: 1. Pharyngitis: Patients with pharyngitis usually experience discomfort, pain, itching or foreign body sensation in the throat, accompanied by nausea and vomiting. This is usually due to irregular diet or eating too much irritating food, long-term smoking and drinking can also lead to pharyngitis. 2, hypertension: mostly seen in the elderly, when the blood pressure rises there will be nausea, dizziness, weakness, especially in the morning when the blood pressure is prone to rise. 3, improper diet: overeating, overeating with irritating food or too cold, too hot food, will cause the gastrointestinal mucosa 4, gastrointestinal diseases: acute and chronic gastritis, gastric ulcer, duodenal ulcer and other diseases, gastrointestinal dysfunction, spleen and stomach digestive function is reduced, manifested as epigastric discomfort accompanied by nausea, vomiting, acid reflux.