If you have, then you are not alone. One of the most common causes includes gustatory rhinitis, a condition where the nasal passages produce excess mucus in response to eating, especially spicy or hot foods. While it is harmless, there are a few things to know about it. Here's a deep understanding of why some people have a runny nose when they eat and what exactly is gustatory rhinitis.  What Is Gustatory Rhinitis? Gustatory rhinitis is a non-allergic condition where eating, particularly spicy or hot foods, triggers the nasal glands to produce more mucus, leading to a runny nose. It is characterised by a watery nasal discharge that starts within minutes of eating. In general, non-allergic rhinitis can be triggered by a number of things, including:

• Dry atmosphere
• Air pollution
• Alcohol
• Certain medications
• Spicy foods
• Strong emotions
• Strong odours, such as perfumes, cleaning products (especially bleach), among others

Spicy Foods Spicy foods are a common trigger for a runny nose while eating. This is due to a chilli pepper extract called capsaicin, found in spicy foods, that can stimulate the mucous membranes and cause nasal congestion or a runny nose. Capsaicin is known for its various health benefits, ranging from pain-reducing effects to heart health to weight loss. In certain cases, it is also said to relieve nasal congestion, as reported in a study published in the Journal of Allergy and Clinical Immunology. Food Allergies While there is a non-allergic-related cause behind a runny nose while eating, some people may have an allergic reaction to certain foods, leading to symptoms like a runny nose, sneezing, or itching. Allergic rhinitis, also known as hay fever, is caused by breathing in allergens like dust mites, pollen, and animal dander. However, this condition can also be caused by eating certain foods that you're allergic to.  How Hot Or Cold Is Your Food? Linked to gustatory rhinitis, a runny nose can also occur while eating hot or cold foods. This is also known as temperature sensitivity, wherein the nasal membranes react to sudden temperature extremes by triggering the production of excess mucus. When exposed to hot or cold foods, blood vessels in the nose expand, causing the nasal glands to produce more mucus as a way to either cool down or warm up the sensitive tissues. This is how the temperature of foods leads to a runny nose while eating. Sinus Issues In addition to the abovementioned causes, people with underlying nasal conditions, such as polyps or chronic , may also experience a runny nose when they eat. This is because of the increased sensitivity of the nasal passages. While nasal polyps are noncancerous growths that can form in the nose or sinuses, chronic sinusitis is a long-term sinus infection that lasts for more than 12 weeks. Both of these conditions require treatments to avoid symptoms and discomfort. Bottomline A runny nose while eating can be uncomfortable, but it is quite natural. The most common explanation behind it is gustatory rhinitis, which occurs when a person eats spicy or hot foods. However, other allergic conditions and underlying nasal problems can also lead to the symptom. If you find yourself frequently sniffling while eating and are curious to find out why it happens, it is best to speak with a healthcare provider. This is particularly important for people who suspect a sinus issue or an allergic reaction to foods.