Cold and diarrhea are mainly caused by improper diet or cold, infection and other causes of gastrointestinal type of colds. You need to observe the body temperature, if the temperature is high patients can be appropriate with antipyretic and analgesic drugs, such as ibuprofen pellets. Blood tests can be done to determine whether the infection is caused by bacterial or viral infection. If there is an obvious bacterial infection, it can be treated with appropriate antibiotics, such as cephalosporin antibiotics, and so on. If it is caused by a viral infection, it can be treated with Chinese herbal medicine to identify the evidence, and can also be treated with oral medicine such as Huoxiang Zhengqi Pill. If the diarrhea is very serious, electrolyte examination is needed to clarify whether there is dehydration or electrolyte disorder, and appropriate rehydration treatment. You can also eat porridge as a dietary supplement.