G44.04

Clinical Causes: The exact cause of CPH is unknown, but it is believed to involve abnormal activity in the hypothalamus, a part of the brain that regulates pain and other functions. Genetic predisposition may play a role in some cases. Triggers such as alcohol, certain medications, or environmental factors are not definitively linked but can sometimes provoke attacks in susceptible individuals. There is no clear evidence linking lifestyle or dietary factors directly to the development of CPH.

Key Symptoms: Severe, short-duration headaches that occur multiple times a day, often more than five attacks daily. The pain is typically unilateral, affecting one side of the head or face. Attacks usually last from 15 minutes to 3 hours. The pain is often described as burning, stabbing, or pulsating. Autonomic symptoms may accompany attacks, such as tearing, redness of the eye, nasal congestion, or runny nose on the affected side. Attacks tend to occur at the same time each day, often in the early morning or evening. Pain relief is typically achieved after the attack ends, with no residual effects. Between attacks, individuals usually experience no symptoms.

Diagnosis Path: Diagnosing CPH involves a thorough medical history and careful evaluation of symptom patterns. Doctors may conduct neurological examinations and use imaging studies like MRI to exclude secondary causes of headaches. The key criteria include frequent attacks of unilateral headache, rapid onset and resolution, and responsiveness to specific treatments. Because CPH is rare and can resemble other headache disorders, diagnosis often requires ruling out more common conditions like migraines or cluster headaches.

Treatment Protocols: Indomethacin: Often the first-line therapy with high success rates. Migraine preventatives: Such as verapamil, may be considered if indomethacin cannot be used. Lifestyle modifications: Avoiding known triggers and maintaining a headache diary can help manage attacks. Other medications: Such as corticosteroids or nerve blocks, may be used in refractory cases.