After catching a cold, respiratory, digestive and systemic symptoms may occur, common nasal congestion, runny nose, abdominal pain, diarrhea, fatigue, fever, etc., the specific symptoms have individual differences. 1. Respiratory symptoms: after catching a cold, respiratory symptoms are more common, such as nasal congestion, runny nose, sneezing, coughing and coughing up phlegm, dry and itchy throat. In a small number of patients, the disease progresses to pneumonia, chest tightness, dyspnea and other symptoms. 2. Gastrointestinal symptoms: some patients may combine with some gastroenteritis symptoms, such as diarrhea, abdominal pain, increased stools. 3. Systemic symptoms: after catching a cold, generalized soreness, fatigue, chills, fever and other symptoms may appear. After the above symptoms appear, you should pay attention to rest, strengthen warmth, drink more water, and eat a light and nutritious diet. Although cold and flu are self-curing, they can easily lead to an acute attack of underlying cardiopulmonary diseases. If the symptoms are severe or persist, or if chronic diseases, the elderly, or children develop colds and flu, it is recommended to consult a doctor for symptomatic medication.