A runny nose when eating hot food may be caused by vasodilatation, which is a normal physiological phenomenon and does not require treatment; it may also be caused by rhinitis, which is abnormal and requires treatment.
When eating hot, spicy and stimulating foods, these foods will stimulate the dilation of capillaries in the nasal cavity and enhance the secretion function, resulting in an increase in exudative secretions, which will lead to the phenomenon of a runny nose, which will be relieved after local cleaning and stopping eating, without special intervention or treatment.
If the patient is sensitive to hot and cold air, hot and cold air stimulates the nasal mucosa, which may lead to the onset of vasomotor rhinitis, with sneezing, watery nasal discharge, nasal congestion, etc., saline can be used for nasal rinsing, nasal spray budesonide to relieve the symptoms.
If the patient has a severe runny nose when he eats hot food, or if the symptoms persist and do not improve, he should go to the hospital in time for treatment.