The cause of heavy eye boogers during a cold may be caused by blockage of the nasolacrimal duct due to nasal congestion during a cold, or it may be caused by viral conjunctivitis as a complication of a cold. Colds are respiratory infectious diseases caused by viruses, which are mainly characterized by symptoms such as nasal congestion, runny nose, cough and sore throat. As the lacrimal gland has to be discharged through the nasal cavity via the tear ducts, lacrimal tubules, tear sacs and nasolacrimal ducts. When a cold with severe nasal congestion leads to blockage of the nasolacrimal duct, it may cause obstruction of tear drainage, leading to dacryocystitis, which results in excessive eye boogers. Heavy eye discharge during a cold may also be associated with conjunctivitis. As respiratory viruses may cause conjunctival inflammation due to retrograde infection through the nasolacrimal duct, or if the patient unintentionally rubs the eyes while wiping cold secretions, leading to eye infections, it can lead to conjunctival inflammation, which can lead to symptoms of heavy eye discharge. In addition to this, heavy eye droppings can also be caused by diseases such as keratitis and dry eye, which are not necessarily entirely related to colds. If the symptoms do not improve or worsen, it is recommended to consult a doctor for a clear diagnosis and treatment under the doctor’s guidance, so as to avoid delaying the condition.