Most of the patients have frequent colds due to low immunity, weak constitution or overexertion, which makes them susceptible to cold and infected with bacteria or viruses, thus causing various types of colds. For example, sneezing, runny nose, fever and cough can be further evaluated and treated through blood tests, biochemistry and other related tests. In addition, infants and young children also suffer from a lack of trace elements such as calcium, iron, zinc, potassium, or anemia, which can lead to colds, so they need to check their trace elements, blood sugar, blood lipids, and liver and kidney functions to determine what is not normal in their bodies so as to treat colds.