The common causes of coughing in the middle of the day include dietary factors, environmental factors and disease factors. 1. Dietary factors: for example, eat too salty, too spicy, stimulating food at noon, because stimulating food will cause damage to the digestive mucous membrane tissue, resulting in a burning sensation, and then cough phenomenon. 2. Environmental factors: for example, the presence of dust or fumes and other irritating odors in the environment, sleep inhalation will occur after the phenomenon of coughing, sneezing, and in severe cases, it will also cause itchy eyes, pain symptoms. 3. Disease factors: such as gastroesophageal reflux, cough variant asthma, respiratory tract infections, etc., can also lead to the phenomenon of coughing in the middle of the day when you sleep, and when it is serious, you will wake up coughing. In short, there are many reasons for coughing in the middle of the day, if the phenomenon exists for a long time, we must consult a doctor in time, and follow the doctor’s instructions for symptomatic treatment.