Headaches: Classification, Clinical Features, and Management

Headaches

Introduction

Headaches are a common neurological complaint characterized by pain in one or more parts of the head or the back of the neck. They are among the most frequent reasons for seeking medical attention.

• Definition: A headache is pain or discomfort in the head, scalp, or neck, ranging from mild to severe intensity.

• Prevalence: Approximately 50% of adults worldwide experience a headache at least once per year.

Aetiology of Headaches

Multiple factors can contribute to the development of headaches.

• Psychological factors: Stress, anxiety, depression

• Physical factors: Poor posture, previous head trauma, surgery, concussions, intracranial hemorrhage

• Genetic factors: Family history, especially in migraines and cluster headaches

• Environmental factors: Allergens, toxic exposure

• Other causes: Infections, acute hypertension, sinusitis, dental problems, fever, hypercapnia, caffeine withdrawal, certain drugs (e.g., nitrates)

Classification of Headaches

Headaches are broadly classified into two main categories based on their underlying cause.

• Primary Headache Disorders: Headaches not caused by another medical condition.

• Secondary Headache Disorders: Headaches resulting from another medical condition.

Type	Examples	Main Features
Primary	Tension-type, Migraine, Cluster headache	Not due to other diseases
Secondary	Infections, hypertension, sinusitis, trauma, drugs	Result from underlying conditions

Epidemiology of Headaches

Headaches are highly prevalent and can significantly impact quality of life.

• 50–75% of adults aged 18–65 years have had a headache in the last year.

• More than 30% of these report migraines.

• 1.7–4% of the world’s population experience headaches on 15 or more days per month.

• Migraines are more common in women and often begin at puberty.

Clinical Manifestations of Headaches

Tension-Type Headaches

Tension-type headaches are the most common form of primary headache.

• Intensity: Mild to moderate

• Description: Sensation of a tight band around the head

• Distribution: Bilateral (both sides of the head)

• Duration: Can be episodic or chronic

• Associated symptoms: Increased sensitivity to light or sound

• Effect of activity: Not worsened by routine activity

Migraine Headaches

Migraines are a type of primary headache with distinct phases and associated symptoms.

• Intensity: Moderate to severe

• Location: Usually one-sided (unilateral)

• Quality: Pulsating pain, aggravated by physical activity

• Associated symptoms: Nausea, extreme sensitivity to light (photophobia) and sound (phonophobia)

• Phases:

  1. Prodrome: Altered mood, food cravings, fatigue, irritability, sensitivity to smells or noise, neck stiffness

  2. Aura: Flashes of light, blind spots, tingling on one side of the face, arm, or leg (may not always occur)

  3. Pain phase: Headache with nausea, photophobia, phonophobia

  4. Postdrome: Mood changes, fatigue, weakness, soreness, cognitive difficulties

Cluster Headaches

Cluster headaches are severe, recurrent headaches that typically affect one side of the head.

• Frequency: Can occur several times a day

• Duration: Brief but extremely severe

• Location: Focused in or around one eye, one temple, or forehead

• Associated symptoms: Blocked/runny nose, drooping eyelid, watering/redness of one eye, facial flushing or sweating

• Types: Episodic or chronic

Danger Signs (Red Flags)

Certain features suggest a more serious underlying cause and require urgent evaluation.

• Sudden onset of severe headache

• No similar headaches in the past

• Concomitant infection

• Altered mental status, visual disturbance, or seizure

• Headache with exertion

• Age over 50 years

• HIV/immunosuppression

• Visual disturbances

• Pregnancy or postpartum state

• Family history of serious neurological disease

• Medications and drugs

• Toxic exposure

Diagnosis of Headaches

Diagnosis is primarily clinical but may require investigations to exclude secondary causes.

• Clinical evaluation: Detailed history and symptom assessment

• Imaging: MRI or CT scan to rule out structural causes

• Other tests: Angiography if vascular causes are suspected

Management of Headaches

Tension-Type Headaches

• Analgesics: Paracetamol, aspirin, ibuprofen

• Fixed-dose combinations (FDCs): Aspirin, paracetamol, and caffeine

• Antidepressants: Amitriptyline (for chronic cases)

• Other: Rest, rarely phenobarbital (not recommended due to risk of rebound headaches)

Migraine Headaches

• NSAIDs: Non-steroidal anti-inflammatory drugs

• FDCs: Aspirin, paracetamol, and caffeine

• Paracetamol: Alone or with metoclopramide

• Dopamine D2 antagonists: Metoclopramide

• Ergot alkaloids: Ergotamine, dihydroergotamine

• Serotonin receptor agonists: Sumatriptan, zolmitriptan, rizatriptan

• Calcitonin gene-related peptide (CGRP) antagonist: Lasmiditan

Cluster Headaches

• Serotonin receptor agonists: Sumatriptan

• Ergot alkaloids: Ergotamine

• NSAIDs: For pain relief

Example: Migraine Management

• A patient with moderate migraine may be treated with a combination of paracetamol and metoclopramide to address both pain and nausea.

• For severe attacks, a serotonin receptor agonist such as sumatriptan may be prescribed.

Additional info: The above notes provide a comprehensive overview of headache types, their clinical features, and management, suitable for medical terminology students. For further study, students should familiarize themselves with the terminology related to neurological assessment and pharmacological agents used in headache management.