Everyday Explained: Why your nose starts running every time you eat spicy food

From chilli peppers to hot sauces, here are the reasons why spicy food often triggers a runny nose.

Do you also love spicy food but avoid it because it often leaves you with a runny nose? You are not alone. From fiery curries to chilli snacks, spicy dishes can trigger an unexpected nasal reaction, even when you are not suffering from a cold. But why does this happen, and what goes on inside your body when you eat something spicy? In this edition of ‘Everyday Explained,’ HT Lifestyle spoke to Dr Sumit Kumar Gaur, Senior Consultant in ENT, Apollo hospital, Bannerghatta road, to understand the science behind this.

What causes a runny nose after eating spicy food?

According to Dr Gaur, a runny nose while eating spicy food is a condition known as gustatory rhinitis. It is a form of non-allergic rhinitis in which the nose produces excess watery mucus in response to certain foods, particularly those containing chilli, pepper and other pungent spices. Unlike an allergic reaction, this response is generally triggered by sensory nerve stimulation rather than an immune response to a food allergen.

A runny nose while eating spicy food is a condition known as gustatory rhinitis. (Pexel)

“Chilli contains capsaicin, a compound responsible for its characteristic heat. When we eat chilli, capsaicin activates the transient receptor potential vanilloid 1 (TRPV1) receptors, which are found on sensory nerve endings in the mouth and other parts of the upper respiratory tract,” said Dr Gaur. These receptors normally respond to heat and certain irritating chemicals.

Their activation sends signals through the nervous system, producing the familiar burning sensation associated with spicy food. In susceptible individuals, this stimulation also triggers reflex responses that increase mucus secretion in the nose, resulting in a watery discharge.

The process involves the autonomic nervous system, particularly parasympathetic nerve pathways that regulate nasal gland secretions. This is why a person may experience a runny nose even when they are not experiencing a cold, infection or allergy. The response can occur within minutes of eating and usually settles once the stimulus is removed.

What else triggers a runny nose?

“Chilli is not the only trigger. Hot mustard, horseradish, black pepper and other pungent ingredients can produce similar effects in some individuals,” said Dr Gaur. Temperature may also play a role, as very hot foods can stimulate sensory pathways and increase nasal secretions. However, the response varies considerably between individuals. Some people may experience pronounced nasal discharge after eating even mildly spicy food, while others can tolerate very spicy meals without any symptoms.

Hot mustard, horseradish, black pepper and other pungent ingredients can produce similar effects in some individuals. (Pexel)

Gustatory rhinitis is generally harmless and does not mean that the person has an allergy to chilli or that their body cannot tolerate spicy food. The main distinction is that gustatory rhinitis typically causes clear, watery nasal discharge during or shortly after eating, without symptoms such as widespread itching, hives, facial swelling or breathing difficulty. If these other symptoms occur, an allergic reaction or another medical problem must be considered.

Dr Gaur highlighted that for people who experience this regularly, reducing the intensity of spices, identifying specific triggers and keeping tissues handy may be sufficient. Saline nasal sprays can help with nasal comfort, while persistent or troublesome symptoms can be assessed by an ENT specialist. In some cases, a doctor may recommend ipratropium bromide nasal spray, which reduces watery nasal secretion.

Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.