Because colds are generally upper respiratory tract infections, generally have nasal congestion, sore throat, cough, tears because the lacrimal glands are secreted outside the eyes, there are colds will also stimulate increased secretion of tears, but the main reason is that after a cold nasal cavity, pharyngeal redness and swelling, inflammation, redness, swelling, the nasal cavity has a temporary narrowing or obstruction, the lacrimal glands through the secretion of tears to the inner corners of the eyes, the inner corners of the tears have tears, tears, tears to the tear sacs, and then to the nasal cavity, this is the normal tears out of the channel. The tear ducts go to the lacrimal sacs and then to the nasal cavity, which is the normal channel for tears to flow out of the eyes. However, after a cold, the nasal cavity becomes congested and blocked, so that the passage of tears through the tear ducts, to the tear sacs and to the nasal cavity is relatively narrow. Colds are mainly a symptom of colds, and treating colds is enough. After the cold is cured, drink plenty of water, pay attention to rest, and you can use medicine for colds, so the tears will be solved, so don’t worry too much.