What Causes Migraines and How to Manage Them

Migraine is a neurological disorder caused by an inherited tendency for the brain to become unusually sensitive to internal and environmental changes. An attack may involve throbbing head pain, nausea, sensory sensitivity, and sometimes aura. Effective management combines early treatment, regular daily habits, trigger awareness, and preventive care when attacks are frequent or disabling.

By Dr. Haiqa Afzal

What Is a Migraine?

A migraine is more than a severe headache. It is a recurring neurological condition that can affect pain-processing pathways, sensory systems, digestion, concentration, mood, and energy. Attacks often last from several hours to several days when untreated or when treatment is ineffective.

Typical migraine pain is moderate to severe, may feel pulsating or throbbing, and can worsen with routine movement. It may affect one or both sides of the head. Nausea, vomiting, sensitivity to light, sound, movement, or smells, and difficulty thinking are common.

Migraine with and without aura

Most people experience migraine without aura. Migraine with aura includes temporary neurological symptoms that usually develop gradually before or during an attack. These may include flashing lights, zigzag lines, blind spots, tingling, numbness, or speech difficulty. New neurological symptoms require medical assessment because stroke and other conditions can sometimes appear similar.

What Causes Migraines?

The exact biological process is complex, but migraine appears to result from interactions between genetics, brain networks, nerves, blood vessels, and chemical messengers. Activation of the trigeminal pain system and release of molecules such as calcitonin gene-related peptide, or CGRP, contribute to inflammation-like signalling and pain during attacks.

Genetic susceptibility

Migraine often runs in families. A person may inherit a nervous system that reacts strongly to changes in sleep, hormones, stress, meals, light, or other stimuli. Genetics do not guarantee that someone will develop migraine, but they can increase susceptibility.

Changes in brain excitability and pain processing

People with migraine may process sensory information differently even between attacks. During an attack, normally tolerable light, sound, smells, or movement may become uncomfortable or painful. This altered processing helps explain why migraine affects much more than the head.

Hormonal influences

Fluctuations in oestrogen can influence migraine, which is why some people notice attacks around menstruation, pregnancy, perimenopause, or changes in hormonal medicines. Hormonal patterns vary, so decisions about contraception or hormone treatment should be discussed with a clinician, especially when aura is present.

Common Migraine Triggers

A trigger does not cause the underlying disorder. Instead, it may increase the likelihood of an attack in someone who is already susceptible. Several smaller factors may combine and push the brain past its migraine threshold.

• Stress or a sudden drop in stress: Both intense pressure and relaxation after a stressful period may precede an attack.
• Irregular sleep: Too little sleep, oversleeping, shift work, jet lag, or changing sleep times can contribute.
• Skipped meals and dehydration: Long gaps between meals and inadequate fluid intake may lower the migraine threshold.
• Hormonal changes: Menstruation is a common pattern for some patients.
• Bright or flickering light: Glare, screens, strong sunlight, and visually busy environments may worsen symptoms.
• Strong smells and noise: Perfume, smoke, chemicals, or loud environments can be relevant for some people.
• Caffeine changes: Excess intake or sudden withdrawal may trigger attacks.
• Alcohol: Alcohol is a recognised trigger for some individuals, but not everyone.
• Weather changes: Heat, humidity, storms, or changes in barometric pressure may be associated with attacks.
• Physical strain: Unaccustomed intense exercise may trigger migraine, although regular gradual exercise can help prevention.

Food triggers are highly individual and are often overestimated. Cravings can also be part of the early migraine phase, making a food appear responsible when the attack had already begun. Avoiding multiple foods without a clear pattern may lead to unnecessary restriction.

Phases and Symptoms of a Migraine Attack

Not every person experiences every phase, and symptoms can differ between attacks.

Prodrome

Hours or sometimes longer before head pain, a person may notice fatigue, yawning, neck discomfort, mood changes, food cravings, thirst, difficulty concentrating, or increased urination.

Aura

Aura usually consists of fully reversible visual, sensory, or language symptoms that develop gradually. It commonly lasts between 5 and 60 minutes, although individual presentations vary and should be evaluated when new or atypical.

Headache phase

Pain may be accompanied by nausea, vomiting, light sensitivity, sound sensitivity, dizziness, scalp tenderness, and worsening with normal activity.

Postdrome

After the main pain improves, some people feel drained, mentally slow, irritable, weak, or sensitive to movement for another day.

How to Manage Migraines

Treat an attack early

Acute treatment generally works best when taken early in the headache phase. Rest in a quiet, darkened room, drink fluids, and reduce sensory stimulation. A cool pack on the head or neck may provide comfort.

Depending on age, pregnancy status, medical history, and other medicines, a clinician may recommend paracetamol, an anti-inflammatory medicine, a migraine-specific triptan, an anti-nausea medicine, or newer migraine-specific treatments such as gepants. Some people need a combination approach. Opioids are generally avoided because they may be less effective for migraine and can contribute to dependence and medication-overuse headache.

People with kidney disease, stomach ulcers, cardiovascular disease, uncontrolled blood pressure, pregnancy, or other significant conditions should seek professional advice before using acute medicines. Triptans and some other treatments are not suitable for everyone.

Avoid medication-overuse headache

Frequent use of acute headache medicines can make headaches more frequent and difficult to control. Keep a record of treatment days, not only the number of tablets. Seek medical advice if acute medication is needed regularly, if its effect is declining, or if headaches are becoming more frequent.

Build a stable daily routine

• Keep sleep and wake times reasonably consistent.
• Eat regular, balanced meals and avoid prolonged fasting.
• Drink enough fluid for your needs and environment.
• Use caffeine consistently and moderately rather than alternating between high intake and sudden withdrawal.
• Exercise regularly, increasing intensity gradually.
• Use relaxation, paced breathing, cognitive behavioural strategies, or mindfulness to manage stress.
• Take regular breaks from screens and reduce glare when light sensitivity is prominent.

Use a headache diary

Record headache days, duration, severity, associated symptoms, menstruation, sleep, meals, stress, acute medicines, and response to treatment. A diary maintained for several weeks can reveal patterns, support diagnosis, and show whether treatment is working. It is more useful than trying to avoid every possible trigger.

Consider preventive treatment

Preventive therapy may be considered when attacks are frequent, prolonged, disabling, poorly controlled by acute treatment, or when acute medicines cause problems. Options vary by country and patient factors and may include certain blood-pressure medicines, antiseizure medicines, antidepressants, CGRP-targeting medicines, or botulinum toxin for selected people with chronic migraine.

Preventive medicines usually require gradual dose adjustment and a fair trial before effectiveness can be judged. Selection should account for pregnancy potential, other illnesses, side effects, patient preference, availability, and cost. Do not start, stop, or change prescription treatment without an appropriate healthcare professional.

When to Seek Urgent Medical Care

Most migraine attacks are not dangerous, but a new or unusual headache may signal another condition. Seek urgent assessment for:

• a sudden, explosive headache that reaches maximum intensity within seconds or minutes;
• headache with weakness, facial drooping, persistent speech difficulty, confusion, fainting, or seizure;
• fever, stiff neck, rash, or marked drowsiness;
• headache after significant head injury;
• new headache during pregnancy or soon after delivery;
• new headache with vision loss, a painful red eye, or severe eye pain;
• a first severe headache after age 50;
• a major change in an established headache pattern;
• headache with cancer, immune suppression, or serious systemic illness.

Call the appropriate emergency service when stroke, meningitis, severe head injury, or another emergency is suspected.

When to Book a Routine Appointment

Arrange a clinical review if headaches occur repeatedly, interfere with work or study, require frequent medicine, wake you regularly, or remain undiagnosed. A clinician can confirm whether the pattern fits migraine, check for secondary causes, review medicine safety, and develop an individual acute and preventive plan.

Living Well with Migraine

Migraine cannot always be eliminated, but many people gain meaningful control by recognising early symptoms, treating attacks promptly, stabilising daily routines, and using preventive therapy when appropriate. The goal is not perfect avoidance of every possible trigger. It is to reduce attack frequency and severity while protecting normal activities, nutrition, sleep, and quality of life.

Medical disclaimer: This article is for general education and does not diagnose or replace individual medical care. Seek advice from a qualified healthcare professional for persistent, severe, changing, or unusual headaches and before altering medication.