Can a migraine be caused by a lack of hydration?

The Hedonist Labs laboratory

Throbbing headaches, nausea, hypersensitivity: migraine shows no mercy. But could simple daily habits such as staying well hydrated help prevent these painful episodes? With migraine affecting millions of people, understanding its triggers and the ways to prevent it is becoming crucial.

Could drinking more water be an underrated remedy for migraine?

Migraine is a common neurological disorder that affects millions of people around the world. Characterised by throbbing headaches often accompanied by nausea, vomiting and heightened sensitivity to light and sound, migraine can have a significant impact on the quality of life of those who suffer from it. Although the exact causes of migraine are not fully understood, many factors have been identified as potential triggers, including stress, hormonal changes, foods, smells and environmental stimuli.

Among these triggers, the role of hydration has attracted considerable interest. The idea that dehydration can help trigger or worsen migraines is widespread, but whether it really is a triggering factor remains a matter of debate. With this in mind, it's important to take a careful look at the potential link between dehydration and migraine, as well as the impact of hydration on preventing and treating this common condition.

UNDERSTANDING MIGRAINES BETTER

Migraine is a type of headache characterised by severe, throbbing pain, usually on one side of the head. Common triggers include certain foods (such as cheese, chocolate or foods containing additives like monosodium glutamate), stress, hormonal changes, strong smells, changes in the weather and intense visual or sound stimuli. Typical symptoms include throbbing headaches, nausea, vomiting, sensitivity to light (photophobia) and sound (phonophobia), and sometimes prodromes such as mood changes or visual disturbances.

THE ROLE OF HYDRATION IN HOW THE BODY WORKS

Water is essential to the proper functioning of the human body. It makes up around 60% of body weight in adults and is needed for many vital physiological functions. Water plays a crucial role in transporting nutrients and oxygen to the cells, eliminating metabolic waste, regulating body temperature and maintaining electrolyte balance.

Dehydration occurs when the body loses more water than it takes in, which can happen as a result of excessive sweating, rapid breathing, vomiting, diarrhoea or insufficient fluid intake. The signs of dehydration include intense thirst, a dry mouth, reduced urine output, dark urine, dry skin, dizziness and confusion. Severe dehydration can lead to serious complications such as kidney problems, seizures and even coma.

POTENTIAL MECHANISMS BY WHICH DEHYDRATION TRIGGERS MIGRAINE

Dehydration can potentially trigger migraines by disrupting several physiological mechanisms. First of all, reduced hydration can influence blood circulation, which can affect blood flow to the brain and lead to changes in intracranial pressure, a known migraine trigger in some people.

In addition, dehydration can alter the normal functioning of the central nervous system, affecting pain sensitivity and the processes that regulate the neurotransmitter serotonin, both of which are involved in the pathophysiology of migraine.

What's more, dehydration can make other migraine triggers worse. For example, dehydration combined with exposure to heat or high levels of stress can increase the likelihood of triggering a migraine attack in susceptible individuals.

In short, although the exact mechanisms are not yet fully understood, dehydration probably affects migraine through several pathways, including altered cerebral circulation, altered neurotransmitters and the amplification of other triggers.

PREVENTION AND MANAGEMENT TIPS

Staying well hydrated can play a crucial role in preventing migraines. Here are a few tips for maintaining an adequate level of hydration and preventing migraines:

1. Drink enough water : Make sure you drink an adequate amount of water throughout the day, especially in hot weather or during intense physical activity. Water needs vary from person to person, but aiming for around 8 glasses of water a day is often recommended.
2. Avoid dehydrating drinks : Limit your intake of drinks containing caffeine, alcohol or a lot of sugar, as they can have a dehydrating effect.
3. Watch for signs of dehydration : Look out for signs of dehydration, such as intense thirst, a dry mouth, reduced urine output and tiredness. If you notice these symptoms, drink water straight away and take steps to rehydrate.
4. Favour water-rich foods : As well as drinking water, eat water-rich foods such as fruit (watermelon, melon, citrus fruit) and vegetables (cucumber, lettuce, celery) to increase your fluid intake.

If you have a migraine, rehydrating can also help relieve the symptoms. If you feel a migraine attack coming on, make sure you drink enough water and avoid drinks that could make your symptoms worse, such as sugary or caffeinated drinks. If the migraine persists despite rehydration, consult a healthcare professional to explore other treatment options.

CONCLUSION

Although the link between dehydration and migraine is still up for debate, it's important to recognise how important staying well hydrated is for preventing migraines. While some studies suggest a link between dehydration and migraine attacks, further research is needed to better understand this link and shed light on the underlying mechanisms.

It's recommended to stay properly hydrated by drinking enough water throughout the day and avoiding dehydrating drinks. It's also essential to watch for signs of dehydration and act accordingly to maintain an optimal fluid balance.

Looking ahead, large-scale longitudinal studies are needed to examine the link between hydration and migraines in depth and to identify potential confounding factors. In addition, research into the underlying physiological mechanisms and the effectiveness of rehydration interventions in treating migraines could offer valuable insights for improving the management of this common condition. Until further progress is made, staying properly hydrated remains a simple but important strategy for managing migraines.