It is best not to eat bird’s nest during cold and flu, as the upper respiratory tract infection occurs due to the influence of cold virus or bacteria, the digestive capacity of the body will be reduced, and the secretion of digestive enzymes will also be relatively reduced, making it easy for indigestion to occur. The protein content of bird’s nest is particularly high, which can easily aggravate the burden of the gastrointestinal tract and lead to indigestion. It is not recommended to eat tonic drugs or food during the cold, it is recommended to eat simple, light and easy to digest. It is recommended to eat rice porridge, millet porridge and fresh fruits and vegetables, which can replenish water, carbohydrates and vitamins and help the body to strengthen its resistance against foreign cold viruses or bacteria, bird’s nest is too tonic and should not be eaten during a cold.