Hunger and sneezing: is there really a link? Science answers

One of the most fascinating explanations involves the vagus nerve, one of the main neuronal "highways" that connects the brain with many internal organs, including:

• stomach
• intestines
• heart
• lungs
• larynx and respiratory tract

The vagus nerve regulates both digestion and heartbeat, but it is also involved in the sneezing reflex. According to some theories, when the stomach sends hunger signals, there may be an overlap with those of sneezing. This "cross-talk" between nerves could explain why some people sneeze when they are hungry. A fascinating theory with solid neurophysiological basis, although scientific confirmation is still needed.

Another possible explanation concerns the way the body reacts under conditions of prolonged hunger. When we have not eaten for hours, we may become more sensitive to stimuli that we would not normally have noticed (these include minor nasal irritations).

In addition, hunger is often accompanied by poor hydration, especially if we skip a meal or drink less during the day. Dehydration can dry out the nasal mucous membranes and make them more reactive, increasing the likelihood of sneezing.

In summary, hunger can increase:

• the reactivity of the autonomic nervous system
• the sensitivity of the nasal mucous membranes
• the frequency of involuntary reflexes (such as sneezing).

It would not be the first time that a "strange" reflection has attracted the attention of science. Here are two well-known examples:

• Photic sneezing (or ACHOO reflex): some people sneeze when they abruptly switch from dim light to bright light, such as sunlight. It happens to about 10-35% of the population.
• Postprandial sneezing: less well known, but real. Some people sneeze immediately after eating, even without allergies or irritation.

These cases show us that the human body can surprise us with out-of-the-ordinary reflexes and reactions.

To date, there are no conclusive scientific studies confirming a direct link between hunger and sneezing. However, the topic is still under-explored, and may become the subject of future research. Some neurophysiological clues and anecdotal data leave room for new hypotheses.

According to a review by the National Institutes of Health, the vagus nerve actually has complex connections between the gastrointestinal and respiratory systems, which could explain certain cross-reflexes.

If you notice that you sneeze when you are hungry, try these simple steps:

• Drink a glass of water to keep your nasal mucous membranes hydrated
• Treat yourself to a light snack to quell the feeling of hunger
• Note down when it happens-it may help you figure out if it is a recurring pattern

The link between sneezing and hunger might seem curious, but it reflects how interconnected the human body is. Although definitive confirmation from research is still lacking, the neurological and physiological underpinnings tell us that it is not a phenomenon to be ignored.

So no, you are not weird. You are simply a human being with a nervous system!