If a patient has two colds in a month, it may be caused by the following reasons: 1) After the patient has recovered from a cold, the patient may not have fully recovered from the cold, and the immunity is relatively low, so the patient is infected with viruses or bacteria again, which can be treated with anti-viral or anti-infective medication. 2) It is possible that the patient did not do a good job in keeping warm after the first time of recovering from a cold, which led to the patient catching a cold again. This situation can be improved by drinking more water and keeping warm. 3. It is also possible that the patient’s body is usually weak and resistance is relatively poor, thus repeatedly infected with viruses or bacteria causing colds. Therefore, patients should pay attention to supplemental nutrition in daily life, as well as take transfer factor, vitamins and other drugs to improve immunity, to avoid the phenomenon of repeated colds.