Mild nausea, this symptom is actually relatively common, mainly including the following: 1, throat diseases: throat diseases actually include tonsillitis, pharyngitis, tonsillar hypertrophy; 2, dry syndrome: long time talking, feel uncomfortable throat; 3, occupational diseases: chefs, painters, etc., long-term in the presence of stimulating environment, causing nausea, is a behavior nausea; 4, Helicobacter pylori infection: in clinically very common, which also leads to many ordinary people have a psychological fear, the vast majority believe that there is a relationship with cancer, etc., which can cause psychological disorders; 5, psychological disorders: including after stimulation can appear; 6, pregnancy: early pregnancy will be nausea; 7, rare diseases: such as a mental shock, fully formed conditioned reflex. In conclusion, nausea is a very common clinical symptom and contains a very large number of diseases that should be looked for the exact cause.