It is often believed in our folklore that a cold during the menstrual period will lead to illnesses such as back and leg pain, joint pain, headache, toothache and other symptoms, the so-called “menstrual disease”, but there is no such concept in the formal medical textbooks, and these diseases or discomforts are considered to be chronic diseases that develop with age. Therefore, the cold in the moon is only the cold symptoms secondary to the cold stimulation during the moon period, which can be judged by the symptoms and auxiliary examination. 1. Judgment according to symptoms 1. Respiratory symptoms: nasal congestion, runny nose, sneezing and other symptoms; 2. Systemic symptoms: dizziness, headache, chills, fever, general weakness and other symptoms may appear in severe cases; 3. Complications: commonly seen when the cold does not improve for more than 1 week or the symptoms worsen, such as ear pain, thickened and yellowed nasal discharge, increased cough, etc. 1. Viral infection: usually the routine blood results show low white blood cells and increased lymphocytes; 2. Bacterial infection: usually the routine blood results show increased white blood cells and increased neutrophils. 1. Balance the advantages and disadvantages before deciding whether medication is needed. For proprietary Chinese medicines with inaccurate efficacy or lack of safety studies during breastfeeding, they are not recommended during breastfeeding. 2. It is recommended to take the medication after the end of a feeding or after the baby enters a long sleep at night.