The feeling of slight nausea throughout the day may be caused by long-term mental stress, staying up late, etc., resulting in plant nerve dysfunction. Usually patients can feel relief through daily life adjustment and appropriate amount of rest. For women of childbearing age, if they have recently had sex and have delayed menstruation, pregnancy is highly suspected and can be judged by early pregnancy test paper or blood test for HCG. In addition, it may also be caused by the following diseases: 1. Respiratory diseases: Commonly caused by colds, which can cause nasal secretions to back up into the throat, resulting in mild nausea throughout the day. Mild can generally heal on its own, and if necessary, medication can also be taken to promote recovery; 2. Digestive system diseases: such as functional dyspepsia, as well as chronic gastritis, chronic hepatitis, chronic cholecystitis patients can appear the symptoms of mild nausea throughout the day. However, patients with functional dyspepsia and chronic gastritis may also have gastrointestinal symptoms such as epigastric distention, belching and loss of appetite; patients with chronic hepatitis in the early stage may also have mild skin and sclera yellowing; patients with chronic cholecystitis may have symptoms such as vague pain in the right upper abdomen, so they can go to the corresponding departments according to the relative typical symptoms of each disease; 3, hematological system diseases: common in iron deficiency anemia, megaloblastic anemia, etc., which occurs in infants and young children, pregnant women and mothers. They occur in infants, pregnant women, mothers and other special patients. The ability of the blood to carry oxygen is damaged to a certain extent, which causes the symptoms of mild nausea throughout the day. Patients with iron deficiency anemia can be relieved by supplementing with iron-rich foods such as lean meat and spinach, and vitamin C-rich foods such as oranges and kiwis, while patients with megaloblastic anemia can be treated with oral folic acid and vitamin B12. If the nausea is gradually severe, patients also need to go to the hospital to receive drug treatment; 4, cardiovascular disease: If there is cardiovascular atherosclerosis, hyperlipidemia, hypertension and other underlying diseases, it can cause chronic cerebral blood supply deficiency, resulting in patients with mild nausea throughout the day. In this case, preliminary judgment can be made based on the patient’s past medical history, and if necessary, the relevant primary care physician can be consulted for the next step of treatment. In addition, for middle-aged and elderly people who are in poor health or at high risk of developing cancer, it is not excluded that mild nausea throughout the day is one of the atypical symptoms of pre-malignant tumors. Initial screening can be performed through regular annual physical examinations to rule out the risk of early cancer existence.