The common implantation cold is usually caused by the decrease in immunity triggered by the implantation of the fertilized egg, leading to symptoms of a cold. If a woman's immunity is normal, the frequency of catching a cold during this period is very low. The colds we often talk about can be divided into the common cold and the flu, which should be correctly recognized as having different symptoms. The common cold mainly manifests as nasal congestion, runny nose, sneezing, tearing, and dry mouth, while the flu primarily shows as muscle soreness in the limbs, fatigue, etc.